Concomitant use w/ reserpine, α-methyldopa, Ca antagonist of verapamil- & diltiazem-type, antiarrhythmics, insulin or oral blood sugar-lowering drugs. Hypercor 2.5: Increased levels/effects of α
1-blockers, α
2-agonists, amifostine, antipsychotic agents (eg, phenothiazines), 2nd generation atypical antipsychotics, bradycardia-causing agents, bromperidol, bupivacaine, cardiac glycosides, ceritinib, cholinergic agonists, disopyramide, duloxetine, ergot derivatives, fexinidazole, fingolimod, grass pollen allergen extr (5 grass extr), hypotension-associated agents, insulins, ivabradine, lacosamide, levodopa-containing products, systemic/topical lidocaine, mepivacaine, methacholine, nitroprusside, pholcodine, siponimod, sulfonylureas. Increased levels/effects w/ acetylcholinesterase inhibitors, alfuzosin, α
2-agonists, aminoquinolines (antimalarial), amiodarone, antipsychotics (eg, phenothiazines), barbiturates, benperidol, brigatinib, topical brimonidine, non-dihydropyridine Ca channel blockers, diazoxide, dipyridamole, disopyramide, dronedarone, floctafenine, herbs (hypotensive properties), lormetazepam, methoxyflurane, midodrine, molsidomine, naftopidil, nicergoline, nicorandil, nifedipine, obinutuzumab, opioids (eg, anilidopiperidine), pentoxifylline, phosphodiesterase 5 inhibitors, propafenone, prostacyclin analogues, quinagolide, regorafenib, reserpine, rivastigmine, ruxolitinib, terlipressin, tofacitinib. Decreased levels/effects of β
2-agonists, nasal/oral/inhalation/racemic/systemic epinephrine, theophylline derivatives. Decreased levels/effects w/ amphetamines, barbiturates, bosentan, brigatinib, bromperidol, moderate/strong CYP3A4 inducers, dabrafenib, deferasirox, dexmethylphenidate, enzalutamide, erdafitinib, herbs (hypertensive properties), ivosidenib, lorlatinib, methylphenidate, mitotane, NSAIDs, rifamycin derivatives, sarilumab, siltuximab, tocilizumab, yohimbine.