7 DRUG INTERACTIONS Concomitant use of antihypertensive medications and vasodilators: increased risk for hypotension, myocardial infarction, pneumonia, falls, and injuries ( 7.2 ) Dopamine antagonists such as neuroleptics or metoclopramide, may diminish the effectiveness of apomorphine hydrocloride ( 7.4 ) 7.1 5HT 3 Antagonists Based on reports of profound hypotension and loss of consciousness when apomorphine hydrocloride was administered with ondansetron, the concomitant use of apomorphine hydrocloride with 5HT 3 antagonists including antiemetics (for example, ondansetron, granisetron, dolasetron, palonosetron) and alosetron, is contraindicated. Concomitant administration of 0.4 mg sublingual nitroglycerin with apomorphine hydrocloride in healthy subjects causes greater decreases in blood pressure compared to apomorphine hydrocloride alone. When nitroglycerin and apomorphine hydrocloride were concomitantly administered to healthy subjects, the mean largest decrease (the mean of each subject's largest drop in blood pressure measured within the 6-hour period following administration of apomorphine hydrocloride) in supine systolic and diastolic blood pressure (measured over 6 hours) was 9.7 mm Hg and 9.3 mm Hg, respectively [see Clinical Pharmacology (12.3) ].
Source: FDA drug label - apomorphine hydrochloride
7.2 Apomorphine Based on reports of profound hypotension and loss of consciousness when apomorphine was administered with ondansetron, the concomitant use of apomorphine with ondansetron is contraindicated [see Contraindications (4) ] .
Source: FDA drug label - ondansetron
7.2 Apomorphine Based on reports of profound hypotension and loss of consciousness when apomorphine was administered with ondansetron, the concomitant use of apomorphine with ondansetron is contraindicated [see Contraindications ( 4 )] .
Source: FDA drug label - ondansetron hydrochloride
7.2 Drugs Metabolized by Catechol-O-Methyltransferase (COMT) Drugs known to be metabolized by COMT, such as isoproterenol, epinephrine, norepinephrine, dopamine, dobutamine, alpha-methyldopa, apomorphine, isoetherine, and bitolterol should be administered with caution in patients receiving entacapone regardless of the route of administration (including inhalation), as their interaction may result in increased heart rates, possibly arrhythmias, and excessive changes in blood pressure [see Warnings and Precautions ((5.10)].
Source: FDA drug label - carbidopa, levodopa and entacapone
Examples apomorphine, bromocriptine, cabergoline, levodopa, pramipexole, ropinirole, and rotigotine 7.2 Effects of Metoclopramide on Other Drugs Table 4 displays the effects of metoclopramide on other drugs. Examples Apomorphine, bromocriptine, cabergoline, levodopa, pramipexole, ropinirole, rotigotine Succinylcholine, Mivacurium Clinical Impact Metoclopramide inhibits plasma cholinesterase leading to enhanced neuromuscular blockade.
Source: FDA drug label - metoclopramide
Examples Apomorphine, bromocriptine, cabergoline, levodopa, pramipexole, ropinirole, and rotigotine. Examples Apomorphine, bromocriptine, cabergoline, levodopa, pramipexole, ropinirole, rotigotine.
Source: FDA drug label - metoclopramide hydrochloride
The effect of tolcapone on the pharmacokinetics of other drugs of this class such as α-methyldopa, dobutamine, apomorphine, and isoproterenol has not been evaluated.
Source: FDA drug label - tolcapone