Methylphenidate

12.1 Mechanism of Action Methylphenidate hydrochloride is a central nervous system (CNS) stimulant. The mode of therapeutic action in ADHD is not known.

1 INDICATIONS AND USAGE Methylphenidate hydrochloride extended-release capsules are indicated for the treatment of Attention Deficit Hyperactivity Disorder (ADHD), in pediatric patients 6 to 12 years of age [see Clinical Studies ( 14 )] . Methylphenidate hydrochloride extended-release capsules are a central nervous system (CNS) stimulant indicated for the treatment of Attention Deficit Hyperactivity Disorder (ADHD) in pediatric patients 6 to 12 years of age. ( 1 )

2 DOSAGE AND ADMINISTRATION Administer orally once daily in the morning. ( 2.2 ) Capsules may be swallowed whole, or opened and the entire contents sprinkled on applesauce. ( 2.2 ) Should not be crushed, chewed, or divided. ( 2.2 ) Patients new to methylphenidate: Start at 20 mg daily, titrating the dose weekly in 10-mg increments. Doses above 60 mg daily are not recommended. ( 2.3 ) For patients currently using methylphenidate hydrochloride tablets or methylphenidate hydrochloride extended-release tablets: Dosage is based on current dose regimen. ( 2.4 ) If switching from other methylphenidate products, discontinue treatment and titrate with methylphenidate hydrochloride extended-release capsules. ( 2.4 ) 2.1 Pretreatment Screening Prior to initiating treatment with central nervous system (CNS) stimulants, including methylphenidate hydrochloride extended-release capsules, assess for the presence of cardiac disease (i.e., perform a careful history including family history of sudden death or ventricular arrhythmia, and physical examination) [see Warnings and Precautions ( 5.2 )] . Assess the risk of abuse prior to prescribing, and monitor for signs of abuse and dependence while on therapy. Maintain careful prescription records, educate patients about abuse, monitor for signs of abuse and overdose, and periodically reevaluate the need for methylphenidate hydrochloride extended-release capsules use [see Boxed Warning, Warnings and Precautions ( 5.1 ), Drug Abuse and Dependence ( 9 )]. 2.2 General Dosing Information The recommended starting dose for methylphenidate hydrochloride extended-release capsules is 20 mg once daily. Increase dosage gradually, in increments of 10 mg weekly. Daily dosage above 60 mg is not recommended. When a lower initial dose is appropriate, patients may begin treatment with 10 mg. Administer methylphenidate hydrochloride extended-release capsules orally once daily in the morning. Methylphenidate hydrochloride extended-release capsules may be swallowed as whole capsules or may be administered by sprinkling the capsule contents on a small amount of applesauce (see specific instructions below). Methylphenidate hydrochloride extended-release capsules and/or their contents should not be crushed, chewed, or divided. The capsules may be carefully opened and the beads sprinkled over a spoonful of applesauce. The applesauce should not be warm because it could affect the modified release properties of this formulation. The mixture of drug and applesauce should be consumed immediately in its entirety. The drug and applesauce mixture should not be stored for future use. Pharmacological treatment of ADHD may be needed for extended periods. Periodically reevaluate the long-term use of methylphenidate hydrochloride tablets and methylphenidate hydrochloride extended-release tablets, and adjust dosage as needed. 2.3 Patients Currently Using Methylphenidate Hydrochloride Tablets or Methylphenidate Hydrochloride Extended-Release Tablets The recommended dose of methylphenidate hydrochloride extended-release capsules for patients currently taking methylphenidate hydrochloride tablets twice daily or methylphenidate hydrochloride extended-release (SR) is provided below. Table 1: Recommended Dose Conversion from Methylphenidate Hydrochloride Tablets or Methylphenidate Hydrochloride Extended-Release Tablets Previous Methylphenidate Hydrochloride Tablets or Methylphenidate Hydrochloride Extended-Release Tablets Dose Recommended Methylphenidate Hydrochloride Extended-Release Capsules Dose 5 mg methylphenidate hydrochloride tablets twice daily 10 mg once daily 10 mg methylphenidate hydrochloride tablets twice daily or 20 mg methylphenidate hydrochloride extended-release tablets 20 mg once daily 15 mg methylphenidate hydrochloride tablets twice daily 30 mg once daily 20 mg methylphenidate hydrochloride tablets twice daily or 40 mg methylphenidate hydrochloride extended-release tablets 40 mg once daily 30 mg methylphenidate hydrochloride tablets twice daily or 60 mg methylphenidate hydrochloride extended-release tablets 60 mg once daily 2.4 Switching from other Methylphenidate Products If switching from other methylphenidate products, discontinue that treatment, and titrate with methylphenidate hydrochloride extended-release capsules using the titration schedule. Do not substitute for other methylphenidate products on a milligram-per-milligram basis, because different methylphenidate base compositions and differing pharmacokinetic profiles [see Description ( 11 ), Clinical Pharmacology ( 12.3 )] . Clinical judgment should be used when selecting the starting dose. Daily dosage above 60 mg is not recommended. 2.5 Dose Reduction and Discontinuation If paradoxical worsening of symptoms or other adverse reactions occur, reduce the dosage, or, if necessary, discontinue methylphenidate hydrochloride extended-release capsules. If improvement is not observed after appropriate dosage adjustment over a one-month period, the

6 ADVERSE REACTIONS The following are discussed in more detail in other sections of the labeling: Abuse and Dependence [see Boxed Warning, Warnings and Precautions ( 5.1 ), Drug Abuse and Dependence ( 9.2 , 9.3 )] Known hypersensitivity to methylphenidate or other ingredients of methylphenidate hydrochloride extended-release capsules [see Contraindications ( 4 )] Hypertensive crisis when used concomitantly with monoamine oxidase inhibitors [see Contraindications ( 4 ), Drug Interactions ( 7.1 )] Serious cardiovascular reactions [see Warnings and Precautions ( 5.2 )] Blood pressure and heart rate increases [see Warnings and Precautions ( 5.3 )] Psychiatric adverse reactions [see Warnings and Precautions ( 5.4 )] Priapism [see Warnings and Precautions ( 5.5 )] Peripheral vasculopathy, including Raynaud’s phenomenon [see Warnings and Precautions ( 5.6 )] Long-term suppression of growth [see Warnings and Precautions ( 5.7 )] Most common adverse reactions (greater than 5% during incidence) were headache, insomnia, upper abdominal pain, decreased appetite, and anorexia. ( 6 ) To report SUSPECTED ADVERSE REACTIONS, contact Teva Pharmaceuticals USA, Inc. at 1-888-838-2872 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials 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 practice. The clinical program for methylphenidate hydrochloride extended-release capsules consisted of 6 studies: 2 controlled clinical studies conducted in children with ADHD aged 6 to 12 years and 4 clinical pharmacology studies conducted in healthy adult volunteers. These studies included a total of 256 subjects; 195 children with ADHD and 61 healthy adult volunteers. The subjects received methylphenidate hydrochloride extended-release capsules in doses of 10 to 40 mg per day. Safety of methylphenidate hydrochloride extended-release capsules was assessed by evaluating frequency and nature of adverse events, routine laboratory tests, vital signs, and body weight. A placebo-controlled, double-blind, parallel-group study was conducted to evaluate the efficacy and safety of methylphenidate hydrochloride extended-release capsules in children with ADHD aged 6 to 12 years. All subjects received methylphenidate hydrochloride extended-release capsules for up to 4 weeks, and had their dose optimally adjusted, prior to entering the double-blind phase of the trial. In the 2-week double-blind treatment phase of this study, patients received either placebo or methylphenidate hydrochloride extended-release capsules at their individually-titrated dose (range 10 mg to 40 mg). Adverse reactions with an incidence greater than 5% during the initial 4-week single-blind methylphenidate hydrochloride extended-release capsule titration period of this study were headache, insomnia, upper abdominal pain, appetite decreased, and anorexia. Adverse reactions with an incidence greater than 2% among methylphenidate hydrochloride extended-release capsule-treated subjects, during the 2-week double-blind phase of the clinical study, are shown in Table 2. Table 2: Adverse Reactions in Greater Than 2% Methylphenidate Hydrochloride Extended-Release Capsule-Treated Subjects in the 2-Week Double-Blind Phase Preferred Term Methylphenidate Hydrochloride Extended-Release Capsules N = 65 N (%) Placebo N = 71 N (%) Anorexia 2 (3.1) 0 (0.0) Insomnia 2 (3.1) 0 (0.0) Adverse Events Associated with Discontinuation of Treatment In the 2-week double-blind treatment phase of a placebo-controlled parallel-group study in children with ADHD, one methylphenidate hydrochloride extended-release capsule-treated subject (1/65, 1.5%) discontinued due to an adverse event (depressed mood). In the single-blind titration period of this study, subjects received methylphenidate hydrochloride extended-release capsules for up to 4 weeks. During this period a total of 6 subjects (6/161, 3.7%) discontinued due to adverse events. The adverse events leading to discontinuation were anger (2 patients), hypomania, anxiety, depressed mood, fatigue, migraine and lethargy. 6.2 Postmarketing Experience The following adverse reactions have been identified during the post approval use of methylphenidate products. Because these reactions were reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency reliably or to establish a causal relationship to drug exposure. Adverse Reactions Reported with Methylphenidate Hydrochloride Tablets, Methylphenidate Hydrochloride Extended-Release Tablets, and Methylphenidate Hydrochloride Extended-Release Capsules Infections and Infestations: nasopharyngitis Blood and the Lymphatic System Disorders: leukopenia, thrombocytopenia, anemia Immune System Disorders: hypersensitivity reactions, including angioedema

7 DRUG INTERACTIONS Antihypertensive drugs: Monitor blood pressure and heart. Adjust dosage of antihypertensive drug as needed. ( 7 ) Avoid use of methylphenidate hydrochloride extended-release capsules on the day of surgery if halogenated anesthetics will be used. ( 7 ) 7.1 Clinically Important Interactions with Methylphenidate Hydrochloride Extended-Release Capsules Table 3 presents clinically important drug interactions with methylphenidate hydrochloride extended-release capsules. Table 3: Drugs Having Clinically Important Drug Interactions with Methylphenidate Hydrochloride Extended-Release Capsules Monoamine Oxidase Inhibitors (MAOI) Clinical Impact Concomitant use of MAOIs and CNS stimulants, including methylphenidate hydrochloride extended-release capsules, can cause hypertensive crisis. Potential outcomes include death, stroke, myocardial infarction, aortic dissection, ophthalmological complications, eclampsia, pulmonary edema, and renal failure [see Contraindications ( 4 )] . Intervention Concomitant use of methylphenidate hydrochloride extended-release capsules with MAOIs or within 14 days after discontinuing MAOI treatment is contraindicated. Examples selegiline, tranylcypromine, isocarboxazid, phenelzine, linezolid, methylene blue Antihypertensive Drugs Clinical Impact Methylphenidate hydrochloride extended-release capsules may decrease the effectiveness of drugs used to treat hypertension [see Warnings and Precautions ( 5.3 )] . Intervention Monitor blood pressure and adjust the dosage of the antihypertensive drug as needed. Examples Potassium-sparing and thiazide diuretics, calcium channel blockers, ACE inhibitors, ARBs, beta blockers, centrally acting alpha-2 receptor agonists. Halogenated Anesthetics Clinical Impact Concomitant use of halogenated anesthetics and methylphenidate hydrochloride extended-release capsules may increase the risk of sudden blood pressure and heart rate increase during surgery. Intervention Avoid use of methylphenidate hydrochloride extended-release capsules in patients being treated with anesthetics on the day of surgery. Examples halothane, isoflurane, enflurane, desflurane, sevoflurane