Methylphenidate Interactions

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

7 DRUG INTERACTIONS Table 3 presents clinically important drug interactions with methylphenidate hydrochloride extended-release. Table 3: Clinically Important Drug Interactions with Methylphenidate Hydrochloride Extended-Release Monoamine Oxidase Inhibitors (MAOI) Clinical Impact: Concomitant use of MAOIs and CNS stimulants, including methylphenidate hydrochloride extended-release, 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 with monoamine oxidase inhibitors (MAOIs) or within 14 days after discontinuing MAOI treatment is contraindicated. Antihypertensive Drugs Clinical Impact: Methylphenidate hydrochloride extended-release may decrease the effectiveness of drugs used to treat hypertension [see Warnings and Precautions (5.3) ] . Intervention: Adjust the dosage of the antihypertensive drug as needed. Halogenated Anesthetics Clinical Impact: Concomitant use of halogenated anesthetics and methylphenidate hydrochloride extended-release may increase the risk of sudden blood pressure and heart rate increase during surgery. Intervention: Monitor blood pressure and avoid use of methylphenidate hydrochloride extended-release in patients being treated with anesthetics on the day of surgery. Risperidone Clinical Impact: Combined use of methylphenidate with risperidone when there is a change, whether an increase or decrease, in dosage of either or both medications, may increase the risk of extrapyramidal symptoms (EPS). Intervention: Monitor for signs of EPS. Antihypertensive Drugs : Monitor blood pressure. Adjust dosage of antihypertensive drug as needed. ( 7 )

7 DRUG INTERACTIONS Antihypertensive Drugs: Monitor blood pressure. Adjust dosage of antihypertensive drug as needed ( 7.1 ). 7.1 Clinically Important Drug Interactions with Methylphenidate Hydrochloride Table 1 presents clinically important drug interactions with methylphenidate hydrochloride. Table 1: Clinically Important Drug Interactions with Methylphenidate Hydrochloride Monoamine Oxidase Inhibitors (MAOI) Clinical Impact Concomitant use of MAOIs and CNS stimulants, including methylphenidate hydrochloride 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 with MAOIs or within 14 days after discontinuing MAOI treatment is contraindicated. Antihypertensive Drugs Clinical Impact Methylphenidate hydrochloride 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. Halogenated Anesthetics Clinical Impact Concomitant use of halogenated anesthetics and methylphenidate hydrochloride may increase the risk of sudden blood pressure and heart rate increase during surgery. Intervention Avoid use of methylphenidate hydrochloride in patients being treated with anesthetics on the day of surgery. Risperidone Clinical Impact Combined use of methylphenidate with risperidone when there is a change, whether an increase or decrease, in dosage of either or both medications, may increase the risk of extrapyramidal symptoms (EPS) Intervention Monitor for signs of EPS

7 DRUG INTERACTIONS Antihypertensive Drugs: Monitor blood pressure. Adjust dosage of antihypertensive drug as needed ( 7.1 ). 7.1 Clinically Important Drug Interactions with Methylphenidate Hydrochloride Table 1 presents clinically important drug interactions with methylphenidate hydrochloride. Table 1: Clinically Important Drug Interactions with Methylphenidate Hydrochloride Monoamine Oxidase Inhibitors (MAOI) Clinical Impact Concomitant use of MAOIs and CNS stimulants, including methylphenidate hydrochloride 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 with MAOIs or within 14 days after discontinuing MAOI treatment is contraindicated. Antihypertensive Drugs Clinical Impact Methylphenidate hydrochloride 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. Halogenated Anesthetics Clinical Impact Concomitant use of halogenated anesthetics and methylphenidate hydrochloride may increase the risk of sudden blood pressure and heart rate increase during surgery. Intervention Avoid use of methylphenidate hydrochloride in patients being treated with anesthetics on the day of surgery. Risperidone Clinical Impact Combined use of methylphenidate with risperidone when there is a change, whether an increase or decrease, in dosage of either or both medications, may increase the risk of extrapyramidal symptoms (EPS) Intervention Monitor for signs of EPS

7 DRUG INTERACTIONS • Antihypertensive Drugs: Monitor blood pressure. Adjust dosage of antihypertensive drug as needed. ( 7.2 ) 7.1 Monoamine Oxidase Inhibitors (MAOI) Concomitant use of MAOIs and CNS stimulants, including methylphenidate transdermal system, can cause hypertensive crisis. Potential outcomes include death, stroke, myocardial infarction, aortic dissection, ophthalmological complications, eclampsia, pulmonary edema, and renal failure [see Contraindications (4.2) ] . Concomitant use of methylphenidate transdermal system with MAOIs or within 14 days after discontinuing MAOI treatment is contraindicated. 7.2 Antihypertensive Drugs Methylphenidate may decrease the effectiveness of drugs used to treat hypertension. Monitor blood pressure and adjust the dosage of the antihypertensive drug as needed [see Warnings and Precautions (5.2) ] . 7.3 Coumarin Anticoagulants, Antidepressants, and Selective Serotonin Reuptake Inhibitors Human pharmacologic studies have shown that methylphenidate may inhibit the metabolism of coumarin anticoagulants, anticonvulsants (e.g., phenobarbital, phenytoin, primidone), and some tricyclic drugs (e.g., imipramine, clomipramine, desipramine) and selective serotonin reuptake inhibitors. Downward dose adjustments of these drugs may be required when given concomitantly with methylphenidate. It may be necessary to adjust the dosage and monitor plasma drug concentrations (or, in the case of coumarin, coagulation times), when initiating or discontinuing methylphenidate. 7.4 Halogenated Anesthetics Concomitant use of halogenated anesthetics and methylphenidate may increase the risk of sudden blood pressure and heart rate increase during surgery. Avoid use of methylphenidate transdermal system in patients being treated with anesthetics on the day of surgery. 7.5 Risperidone Combined use of methylphenidate with risperidone when there is a change in dosage, whether an increase or decrease, of either or both medications, may increase the risk of extrapyramidal symptoms (EPS). Monitor for signs of EPS.