Tapentadol Hydrochloride

Tapentadol extended-release tablets are indicated for the management of: Severe and persistent pain in adults that requires an extended treatment period with a daily opioid analgesic and for which alternative treatment options are inadequate. Severe and persistent neuropathic pain associated with diabetic peripheral neuropathy (DPN) in adults that requires an extended treatment period with a daily opioid analgesic and for which alternative treatment options are inadequate. Limitations of Use Because of the risks of addiction, abuse, and misuse with opioids, which can occur at any dosage or duration, and because of the greater risks of overdose and death with extended-release/long-acting opioid formulations [see Warnings and Precautions (5.1) ] , reserve tapentadol extended-release tablets for use in patients for whom alternative treatment options (e.g., non-opioid analgesics or immediate-release opioids) are ineffective, not tolerated, or would be otherwise inadequate to provide sufficient management of pain. tapentadol extended-release tablets are not indicated as an as-needed (prn) analgesic. Tapentadol extended-release tablet is an opioid agonist indicated for the management of: severe and persistent pain that requires an extended treatment period with a daily opioid analgesic and for which alternative treatment options are inadequate. ( 1 ) severe and persistent neuropathic pain associated with diabetic peripheral neuropathy (DPN) in adults that requires an extended treatment period with a daily opioid analgesic and for which alternative treatment options are inadequate. ( 1 ) Limitations of Use ( 1 ) Because of the risks of addiction, abuse, and misuse with opioids, which can occur at any dosage or duration, and because of the greater risks of overdose and death with extended-release/long-acting opioid formulations, reserve tapentadol extended-release tablets for use in patients for whom alternative treatment options (e.g., non-opioid analgesics or immediate-release opioids) are ineffective, not tolerated, or would be otherwise inadequate to provide sufficient management of pain. Tapentadol extended-release tablets are not indicated as an as-needed (prn) analgesic.

Tapentadol extended-release tablets 50 mg, 100 mg, 150 mg, 200 mg and 250 mg extended-release tablets are available in the following colors and prints: 50 mg extended-release tablets are white oblong-shaped with a black print "OMJ 50" on one side 100 mg extended-release tablets are light-blue oblong-shaped with a black print "OMJ 100" on one side 150 mg extended-release tablets are blue-green oblong-shaped with a black print "OMJ 150" on one side 200 mg extended-release tablets are blue oblong-shaped with a depression in the middle running lengthwise on each side and a black print "OMJ 200" on one side 250 mg extended-release tablets are dark blue oblong-shaped with a depression in the middle running lengthwise on each side and a white print "OMJ 250" on one side Extended-release tablets: 50 mg, 100 mg, 150 mg, 200 mg, 250 mg ( 3 )

Tapentadol extended-release tablets are contraindicated in patients with: Significant respiratory depression Acute or severe bronchial asthma or hypercarbia in an unmonitored setting or in the absence of resuscitative equipment Known or suspected gastrointestinal obstruction, including paralytic ileus Hypersensitivity (e.g., anaphylaxis, angioedema) to tapentadol or to any other ingredients of the product [see Adverse Reactions (6.2) ] Concurrent use of monoamine oxidase inhibitors (MAOIs) or use of MAOIs within the last 14 days [see Drug Interactions (7) ] Significant respiratory depression ( 4 ) Acute or severe bronchial asthma ( 4 ) Known or suspected paralytic ileus ( 4 ) Hypersensitivity to tapentadol or to any other ingredients of the product ( 4 ) Concurrent use of monoamine oxidase inhibitors (MAOIs) or use of MAOIs within the last 14 days. ( 4 )

Opioid-Induced Hyperalgesia and Allodynia: Opioid-Induced Hyperalgesia (OIH) occurs when an opioid analgesic paradoxically causes an increase in pain, or an increase in sensitivity to pain. If OIH is suspected, carefully consider appropriately decreasing the dose of the current opioid analgesic or opioid rotation. ( 5.6 ) Serotonin Syndrome with Concomitant Use of Serotonergic Drugs: Potentially life-threatening condition could result from concomitant serotonergic drug administration. Discontinue tapentadol extended-release tablets if serotonin syndrome is suspected. ( 5.7 ) Life-Threatening Respiratory Depression in Patients with Chronic Pulmonary Disease or in Elderly, Cachectic, or Debilitated Patients: Regularly evaluate, particularly during initiation and titration. ( 5.8 ) Adrenal Insufficiency : If diagnosed, treat with physiologic replacement of corticosteroids, and wean patient off of the opioid. ( 5.9 ) Severe Hypotension : Regularly evaluate during dosage initiation and titration. Avoid use of tapentadol extended-release tablets in patients with circulatory shock. ( 5.10 ) Risks of Use in Patients with Increased Intracranial Pressure, Brain Tumors, Head Injury, or Impaired Consciousness : Monitor for sedation and respiratory depression. Avoid use of tapentadol extended-release tablets in patients with impaired consciousness or coma. ( 5.11 )

5.1 Addiction, Abuse, and Misuse Tapentadol extended-release tablets contain tapentadol, a Schedule II controlled substance. As an opioid, tapentadol extended-release tablets expose users to the risks of addiction, abuse, and misuse. Because extended-release products such as tapentadol extended-release tablets deliver the opioid over an extended period of time, there is a greater risk for overdose and death due to the larger amount of tapentadol present [see Drug Abuse and Dependence (9) ] . Although the risk of addiction in any individual is unknown, it can occur in patients appropriately prescribed tapentadol extended-release tablets. Addiction can occur at recommended doses and if the drug is misused or abused. Assess each patient's risk for opioid addiction, abuse, or misuse prior to prescribing tapentadol extended-release tablets, and reassess all patients receiving tapentadol extended-release tablets for the development of these behaviors and conditions. Risks are increased in patients with a personal or family history of substance abuse (including drug or alcohol abuse or addiction) or mental illness (e.g., major depression). The potential for these risks should not, however, prevent the prescribing of tapentadol extended-release tablets for the proper management of pain in any given patient. Patients at increased risk may be prescribed opioids such as tapentadol extended-release tablets but use in such patients necessitates intensive counseling about the risks and proper use of tapentadol extended-release tablets along with frequent reevaluation for signs of addiction, abuse, and misuse. Consider prescribing naloxone for the emergency treatment of opioid overdose [see Dosage and Administration (2.2) , Warnings and Precautions (5.2) ] . Abuse or misuse of tapentadol extended-release tablets by crushing, chewing, snorting, or injecting the dissolved product will result in the uncontrolled delivery of tapentadol and can result in overdose and death [see Overdosage (10) ] . Opioids are sought for nonmedical use and are subject to diversion from legitimate prescribed use. Consider these risks when prescribing or dispensing tapentadol extended-release tablets. Strategies to reduce these risks include prescribing the drug in the smallest appropriate quantity and advising the patient on careful storage of the drug during the course of treatment and the proper disposal of unused drug. Contact the local state professional licensing board or state-controlled substances authority for information on how to prevent and detect abuse or diversion of this product.

5.2 Life-Threatening Respiratory Depression Serious, life-threatening, or fatal respiratory depression has been reported with the use of opioids, even when used as recommended. Respiratory depression, if not immediately recognized and treated, may lead to respiratory arrest and death. Management of respiratory depression may include close observation, supportive measures, and use of opioid antagonists, depending on the patient's clinical status [see Overdosage (10) ] . Carbon dioxide (CO 2 ) retention from opioid-induced respiratory depression can exacerbate the sedating effects of opioids. While serious, life-threatening, or fatal respiratory depression can occur at any time during the use of tapentadol extended-release tablets, the risk is greatest during the initiation of therapy or following a dosage increase. To reduce the risk of respiratory depression, proper dosing and titration of tapentadol extended-release tablets are essential [see Dosage and Administration (2) ] . Overestimating the tapentadol extended-release tablet dosage when converting patients from another opioid product can result in fatal overdose with the first dose. Accidental ingestion of even one dose of tapentadol extended-release tablets, especially by children, can result in respiratory depression and death due to an overdose of tapentadol. Educate patients and caregivers on how to recognize respiratory depression and emphasize the importance of calling 911 or getting emergency medical help right away in the event of a known or suspected overdose . Opioids can cause sleep-related breathing disorders including central sleep apnea (CSA) and sleep-related hypoxemia. Opioid use increases the risk of CSA in a dose-dependent fashion. In patients who present with CSA, consider decreasing the opioid dosage using best practices for opioid taper [see Dosage and Administration (2.6) ]. Patient Access to Naloxone for the Emergency Treatment of Opioid Overdose Discuss the availability of naloxone for the emergency treatment of opioid overdose with the patient and caregiver and assess the potential need for access to naloxone, both when initiating and renewing treatment with tapentadol extended-release tablets. Inform patients and caregivers about the various ways to obtain naloxone as permitted by individual state naloxone dispensing and prescribing requirements or guidelines (e.g., by prescription, directly from a pharmacist, or as part of a community-based program). Educate patients and caregivers on how to recognize respiratory depression and emphasize the importance of calling 911 or getting emergency medical help, even if naloxone is administered . Consider prescribing naloxone, based on the patient's risk factors for overdose, such as concomitant use of CNS depressants, a history of opioid use disorder, or prior opioid overdose. The presence of risk factors for overdose should not prevent the proper management of pain in any given patient. Also consider prescribing naloxone if the patient has household members (including children) or other close contacts at risk for accidental ingestion or overdose. If naloxone is prescribed, educate patients and caregivers on how to treat with naloxone [see Dosage and Administration (2.2) , Warnings and Precautions (5.1 , 5.3) , Overdosage (10) ].

5.3 Risks from Concomitant Use with Benzodiazepines or Other CNS Depressants Patients must not consume alcoholic beverages or prescription or non-prescription products containing alcohol while on tapentadol extended-release tablet therapy. The co-ingestion of alcohol with tapentadol extended-release tablets may result in increased plasma tapentadol levels and a potentially fatal overdose of tapentadol [see Clinical Pharmacology (12.3) ] . […]

The following serious adverse reactions are described, or described in greater detail, in other sections: Addiction, Abuse, and Misuse [see Warnings and Precautions (5.1) ] Life-Threatening Respiratory Depression [see Warnings and Precautions (5.2) ] Interaction with Benzodiazepine or Other CNS Depressants [see Warnings and Precautions (5.3) ] Neonatal Opioid Withdrawal Syndrome [see Warnings and Precautions (5.4) ] Opioid-Induced Hyperalgesia and Allodynia [see Warnings and Precautions (5.6) ] Serotonin Syndrome [see Warnings and Precautions (5.7) ] Adrenal Insufficiency [see Warnings and Precautions (5.9) ] Severe Hypotension [see Warnings and Precautions (5.10) ] Gastrointestinal Adverse Reactions [see Warnings and Precautions (5.12) ] Seizures [see Warnings and Precautions (5.13) ] Withdrawal [see Warnings and Precautions (5.14) ] The most common (≥10%) adverse reactions were nausea, constipation, dizziness, headache, and somnolence. ( 6 ) To report SUSPECTED ADVERSE REACTIONS, contact Hikma Pharmaceuticals USA Inc. at 1-800-962-8364 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch .

6.1 Clinical Trial Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. Commonly-Observed Adverse Reactions in Clinical Studies with tapentadol extended-release tablets in Patients with Chronic Pain due to Low Back Pain or Osteoarthritis The safety data described in Table 1 below are based on three pooled, randomized, double-blind, placebo-controlled, parallel group, 15-week studies of tapentadol extended-release tablets (dosed 100 to 250 mg BID after a 50 mg BID starting dose) in patients with chronic pain due to low back pain (LBP) and osteoarthritis (OA). These trials included 980 tapentadol extended-release tablet-treated patients and 993 placebo-treated patients. The mean age was 57 years old; 63% were female and 37% were male; 83% were White, 10% were Black, and 5% were Hispanic. The most common adverse reactions (reported by ≥10% in any tapentadol extended-release tablet dose group) were: nausea, constipation, dizziness, headache, and somnolence. The most common reasons for discontinuation due to adverse reactions in eight Phase 2/3 pooled studies reported by ≥1% in any tapentadol extended-release tablet dose group for tapentadol extended-release tablet- and placebo-treated patients were nausea (4% vs. 1%), dizziness (3% vs. <1%), vomiting (3% vs. <1%), somnolence (2% vs. <1%), constipation (1% vs. <1%), headache (1% vs. <1%), and fatigue (1% vs. <1%), respectively. Table 1. Adverse Drug Reactions Reported by ≥ 1% of tapentadol extended-release tablet-Treated Patients and Greater than Placebo-Treated Patients in Pooled Parallel-Group Trials MedDRA preferred terms. The trials included forced titration during the first week of dosing. Tapentadol extended-release tablets 50 to 250 mg BID Tapentadol extended-release tablet dosed between 100 and 250 mg BID after a starting dose of 50 mg BID (n=980) Placebo (n=993) Nausea 21% 7% Constipation 17% 7% Dizziness 17% 6% Headache 15% 13% Somnolence 12% 4% Fatigue 9% 4% Vomiting 8% 3% Dry mouth 7% 2% Hyperhidrosis 5% <1% Pruritus 5% 2% Insomnia 4% 2% Dyspepsia 3% 2% Lethargy 2% <1% Asthenia 2% <1% Anxiety 2% 1% Decreased appetite 2% <1% Vertigo 2% <1% Hot flush 2% <1% Disturbance in attention 1% <1% Tremor 1% <1% Chills 1% 0% Abnormal dreams 1% <1% Depression 1% <1% Vision blurred 1% <1% Erectile dysfunction 1% <1% Commonly-Observed Adverse Reactions in Clinical Studies with tapentadol extended-release tablets in Patients with Neuropathic Pain Associated with Diabetic Peripheral Neuropathy The types of adverse reactions seen in the studies of patients with painful diabetic peripheral neuropathy (DPN) were similar to what was seen in the low back pain and osteoarthritis trials. The safety data described in Table 2 below are based on two pooled, randomized withdrawal, double-blind, placebo-controlled, 12-week studies of tapentadol extended-release tablets (dosed 100 to 250 mg BID) in patients with neuropathic pain associated with diabetic peripheral neuropathy. These trials included 1040 tapentadol extended-release tablet-treated patients and 343 placebo-treated patients. The mean age was 60 years old; 40% were female and 60% were male; 76% were White, 12% were Black, and 12% were "Other". The most commonly reported ADRs (incidence ≥10% in tapentadol extended-release tablet-treated subjects) were: nausea, constipation, vomiting, dizziness, somnolence, and headache. Table 2 lists the common adverse reactions reported in 1% or more of tapentadol extended-release tablet-treated patients and greater than placebo-treated patients with neuropathic pain associated with diabetic peripheral neuropathy in the two pooled studies. Table 2. Adverse Drug Reactions Reported by ≥ 1% of tapentadol extended-release tablet-Treated Patients and Greater than Placebo-Treated Patients in Pooled Trials (Studies DPN-1 and DPN-2) MedDRA preferred terms. Tapentadol extended-release tablets 50 to 250 mg BID Tapentadol extended-release tablets dosed between 100 and 250 mg BID after a starting dose of 50 mg BID. It includes ADR reported in the open-label titration period for all subjects and in the double-blind maintenance period for the subjects who were randomized to tapentadol extended-release tablet. (n=1040) Placebo It includes ADR reported in the double-blind maintenance period for the subjects who were randomized to placebo after receiving tapentadol extended-release tablets during the open-label titration period. (n=343) Nausea 27% 8% Dizziness 18% 2% Somnolence 14% <1% Constipation 13% <1% Vomiting 12% 3% Headache 10% 5% Fatigue 9% <1% Pruritus 8% 0% Dry mouth 7% <1% Diarrhea 7% 5% Decreased appetite 6% <1% Anxiety 5% 4% Insomnia 4% 3% Hyperhidrosis 3% 2% Hot flush 3% 2% Tremor Tremor was observed in 3.4% of tapentadol extended-release tablet-treated subjects vs. 3.2% in placebo group, chills in 1.3% vs.1.2% in placebo, and feeling cold- in 1.3% vs.1.2% in placebo. 3% 3% Abnormal dreams 2% 0% Lethargy 2% 0% Asthenia 2% <1% Irritability 2% 1% Dyspnea 1% 0% Nervousness 1% 0% Sedation 1% 0% Vision blurred 1% 0% Pruritus generalized 1% 0% Vertigo 1% <1% Abdominal discomfort 1% <1% Hypotension 1% <1% Dyspepsia 1% <1% Hypoesthesia 1% <1% Depression 1% <1% Rash 1% <1% Chills 1% 1% Feeling cold 1% 1% Drug withdrawal syndrome 1% <1% Other Adverse Reactions Observed During the Premarketing Evaluation of tapentadol extended-release tablets The following additional adverse drug reactions occurred in less than 1% of tapentadol extended-release tablet-treated patients in ten Phase 2/3 clinical studies: Nervous system disorders: paresthesia, balance disorder, syncope, memory impairment, mental impairment, depressed level of consciousness, dysarthria, presyncope, coordination abnormal Gastrointestinal disorders: impaired gastric emptying General disorders and administration site conditions: feeling abnormal, feeling drunk Psychiatric disorders: perception disturbances, disorientation, confusional state, agitation, euphoric mood, drug dependence, thinking abnormal, nightmare Skin and subcutaneous tissue disorders: urticaria Metabolism and nutrition disorders: weight decreased Cardiac disorders: heart rate increased, palpitations, heart rate decreased, left bundle branch block Vascular disorder: blood pressure decreased Respiratory, thoracic and mediastinal disorders: respiratory depression Renal and urinary disorders: urinary hesitation, pollakiuria Reproductive system and breast disorders: sexual dysfunction Eye disorders: visual disturbance Immune system disorders: drug hypersensitivity

6.2 Postmarketing Experience The following adverse reactions have been identified during post approval use of tapentadol. […]

Table 3 includes clinically significant drug interactions with tapentadol extended-release tablets. Table 3. Clinically Significant Drug Interactions with tapentadol extended-release tablets Alcohol Clinical Impact: Concomitant use of alcohol with tapentadol extended-release tablets can result in an increase of tapentadol plasma levels and potentially fatal overdose of tapentadol. Intervention: Instruct patients not to consume alcoholic beverages or use prescription or non-prescription products containing alcohol while on tapentadol extended-release tablet therapy [see Warnings and Precautions (5.3) ] . Benzodiazepines and Other Central Nervous System (CNS) Depressants Clinical Impact: Due to additive pharmacologic effect, the concomitant use of benzodiazepines or other CNS depressants, including alcohol, can increase the risk of hypotension, respiratory depression, profound sedation, coma, and death [see Warnings and Precautions (5.3) ] . Intervention: Reserve concomitant prescribing of these drugs for use in patients for whom alternative treatment options are inadequate. Limit dosages and durations to the minimum required. Inform patients and caregivers of this potential interaction and educate them on the signs and symptoms of respiratory depression (including sedation). If concomitant use is warranted, consider prescribing naloxone for the emergency treatment of opioid overdose [see Dosage and Administration (2.2) , Warnings and Precautions (5.1 , 5.2 , 5.3) ]. Examples: Benzodiazepines and other sedatives/hypnotics, anxiolytics, tranquilizers, muscle relaxants, general anesthetics, antipsychotics, other opioids, alcohol Serotonergic Drugs Clinical Impact: The concomitant use of opioids with other drugs that affect the serotonergic neurotransmitter system has resulted in serotonin syndrome [see Warnings and Precautions (5.7) ]. Intervention: If concomitant use is warranted, frequently evaluate the patient, particularly during treatment initiation and dose adjustment. Discontinue tapentadol extended-release tablet if serotonin syndrome is suspected. Examples: Selective serotonin reuptake inhibitors (SSRIs), serotonin and norepinephrine reuptake inhibitors (SNRIs), tricyclic antidepressants (TCAs), triptans, 5-HT3 receptor antagonists, drugs that affect the serotonin neurotransmitter system (e.g., mirtazapine, trazodone, tramadol), certain muscle relaxants (i.e., cyclobenzaprine, metaxalone), monoamine oxidase (MAO) inhibitors (those intended to treat psychiatric disorders and also others, such as linezolid and intravenous methylene blue) Monoamine Oxidase Inhibitors (MAOIs) Clinical Impact: MAOI interactions with opioids may manifest as serotonin syndrome or opioid toxicity (e.g., respiratory depression, coma) [see Warnings and Precautions (5.2) ]. Intervention: Do not use tapentadol extended-release tablet in patients taking MAOIs or within 14 days of stopping such treatment. Examples: phenelzine, tranylcypromine, linezolid Mixed Agonist/Antagonist and Partial Agonist Opioid Analgesics Clinical Impact: May reduce the analgesic effect of tapentadol extended-release tablets and/or precipitate withdrawal symptoms. Intervention: Avoid concomitant use. Examples: butorphanol, nalbuphine, pentazocine, buprenorphine Muscle Relaxants Clinical Impact: Tapentadol may enhance the neuromuscular blocking action of skeletal muscle relaxants and produce an increased degree of respiratory depression. Intervention: Because respiratory depression may be greater than otherwise expected, decrease the dosage of tapentadol extended-release tablets and/or the muscle relaxant as necessary. Due to the risk of respiratory depression with concomitant use of skeletal muscle relaxants and opioids, consider prescribing naloxone for the emergency treatment of opioid overdose [see Dosage and Administration (2.2) , Warnings and Precautions (5.2 , 5.3) ] Examples: cyclobenzaprine, metaxalone Diuretics Clinical Impact: Opioids can reduce the efficacy of diuretics by inducing the release of antidiuretic hormone. Intervention: Evaluate patients for signs of diminished diuresis and/or effects on blood pressure and increase the dosage of the diuretic as needed. Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. Intervention: Evaluate patients for signs of urinary retention or reduced gastric motility when tapentadol extended-release tablets are used concomitantly with anticholinergic drugs. Mixed Agonist/Antagonist and Partial Agonist Opioid Analgesics : Avoid use with tapentadol extended-release tablets because they may reduce analgesic effect of tapentadol extended-release tablets or precipitate withdrawal symptoms. ( 5.13 , 7 )

Pregnancy : Based on animal data, may cause fetal harm. ( 8.1 ) Lactation: Not recommended. ( 8.2 ) Severe Hepatic or Renal Impairment: Use not recommended. ( 8.6 , 8.7 )

8.1 Pregnancy Risk Summary Use of opioid analgesics for an extended period of time during pregnancy may cause neonatal opioid withdrawal syndrome [see Warnings and Precautions (5.4) ]. Available data with tapentadol extended-release tablets are insufficient to inform a drug-associated risk for major birth defects and miscarriage or adverse maternal outcomes. In animal reproduction studies, embryofetal mortality and structural malformations were observed with subcutaneous administration of tapentadol during organogenesis to rabbits and delays in skeletal maturation were observed in rats at exposures equivalent to and less than the maximum recommended human dose (MRHD), respectively. When administered to pregnant rats during organogenesis and through lactation, increased pup mortality was noted following oral tapentadol exposures to doses equivalent to the MRHD [see Data ] . Based on animal data, advise pregnant women of the potential risk to a fetus. The background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse reaction. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively. Clinical Considerations Fetal/neonatal adverse reactions Use of opioid analgesics for an extended period of time during pregnancy for medical or nonmedical purposes can result in physical dependence in the neonate and neonatal opioid withdrawal syndrome shortly after birth. Neonatal opioid withdrawal syndrome presents as irritability, hyperactivity and abnormal sleep pattern, high pitched cry, tremor, vomiting, diarrhea, and failure to gain weight. The onset, duration, and severity of neonatal opioid withdrawal syndrome vary based on the specific opioid used, duration of use, timing and amount of last maternal use, and rate of elimination of the drug by the newborn. Observe newborns for symptoms of neonatal opioid withdrawal syndrome and manage accordingly [see Warnings and Precautions (5.4) ]. Labor or Delivery Opioids cross the placenta and may produce respiratory depression and psychophysiological effects in neonates. An opioid antagonist, such as naloxone, must be available for reversal of opioid-induced respiratory depression in the neonate. tapentadol extended-release tablets are not recommended for use in pregnant women during and immediately prior to labor, when use of shorter-acting analgesics or other analgesic techniques are more appropriate. Opioid analgesics, including tapentadol extended-release tablets, can prolong labor through actions that temporarily reduce the strength, duration, and frequency of uterine contractions. However, this effect is not consistent and may be offset by an increased rate of cervical dilatation, which tends to shorten labor. Monitor neonates exposed to opioid analgesics during labor for signs of excess sedation and respiratory depression. Data Animal Data Tapentadol HCl was evaluated for teratogenic effects in pregnant rats and rabbits following intravenous and subcutaneous exposure during the period of embryofetal organogenesis. When tapentadol was administered twice daily by the subcutaneous route in rats at dose levels of 10, 20, or 40 mg/kg/day [producing up to 1.36 times the plasma exposure at the maximum recommended human dose (MRHD) of 500 mg/day for tapentadol extended-release tablets based on an area under the time-curve (AUC) comparison], no teratogenic effects were observed. Evidence of embryofetal toxicity included transient delays in skeletal maturation (i.e., reduced ossification) at the 40 mg/kg/day dose which was associated with significant maternal toxicity. Administration of tapentadol HCl in rabbits at doses of 4, 10, or 24 mg/kg/day by subcutaneous injection [producing 0.3, 0.8, and 2.5 times the plasma exposure at the MRHD based on an AUC comparison, respectively] revealed embryofetal toxicity at doses ≥10 mg/kg/day. Findings included reduced fetal viability, skeletal delays and other variations. In addition, there were multiple malformations including gastroschisis/thoracogastroschisis, amelia/phocomelia, and cleft palate at doses ≥10 mg/kg/day and above, and ablepharia, encephalopathy, and spina bifida at the high dose of 24 mg/kg/day. Embryofetal toxicity, including malformations, may be secondary to the significant maternal toxicity observed in the study. In a study of pre- and postnatal development in rats, oral administration of tapentadol at doses of 20, 50, 150, or 300 mg/kg/day to pregnant and lactating rats during the late gestation and early postnatal period [resulting in up to 2.28 times the plasma exposure at the MRHD on an AUC basis] did not influence physical or reflex development, the outcome of neurobehavioral tests or reproductive parameters. At maternal tapentadol doses ≥150 mg/kg/day, a dose-related increase in pup mortality was observed to postnatal Day 4. Treatment-related developmental delay was observed in the dead pups, including incomplete ossification. In addition, significant reductions in pup body weights and body weight gains at doses associated with maternal toxicity (150 mg/kg/day and above) were seen throughout lactation.

8.2 Lactation Risk Summary There is insufficient/limited information on the excretion of tapentadol in human or animal breast milk. Physicochemical and available pharmacodynamic/toxicological data on tapentadol point to excretion in breast milk and risk to the breastfeeding child cannot be excluded. Because of the potential for serious adverse reactions including excess sedation and respiratory depression in a breastfed infant, advise patients that breast feeding is not recommended during treatment with tapentadol extended-release tablets. Clinical Considerations Monitor infants exposed to tapentadol extended-release tablets through breast milk for excess sedation and respiratory depression. Withdrawal symptoms can occur in breastfed infants when maternal administration of an opioid analgesic is stopped, or when breast-feeding is stopped.

8.3 Females and Males of Reproductive Potential Infertility Use of opioids for an extended period of time may cause reduced fertility in females and males of reproductive potential. It is not known whether these effects on fertility are reversible [see Adverse Reactions (6.2) , Nonclinical Toxicology (13.1) ] .

8.4 Pediatric Use The safety and efficacy of tapentadol extended-release tablets in pediatric patients less than 18 years of age have not been established.

8.5 Geriatric Use Of the total number of patients in Phase 2/3 double-blind, multiple-dose clinical studies of tapentadol extended-release tablets, 28% (1023/3613) were 65 years and over, while 7% (245/3613) were 75 years and over. No overall differences in effectiveness or tolerability were observed between these patients and younger patients. Elderly patients (aged 65 or older) may have increased sensitivity to tapentadol. In general, use caution when selecting a dosage for an elderly patient, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function and of concomitant disease or other drug therapy [see Clinical Pharmacology (12.3) ] . Respiratory depression is the chief risk for elderly patients treated with opioids and has occurred after large initial doses were administered to patients who were not opioid-tolerant or when opioids were co-administered with other agents that depress respiration. […]

Tapentadol is a centrally-acting synthetic analgesic. The exact mechanism of action is unknown. Although the clinical relevance is unclear, preclinical studies have shown that tapentadol is a mu-opioid receptor (MOR) agonist and a norepinephrine reuptake inhibitor (NRI). Analgesia in animal models is derived from both of these properties.