May increase levels/effects of amifostine, 2nd generation antipsychotics, bromperidol, duloxetine, hypotension associated agents, levodopa, nitroprusside, pholcodine. Increased levels/effects w/ alfuzosin, barbiturates, benperidol, brigatinib, topical brimonidine, dapoxetine, diazoxide, herbs (hypotensive properties), lormetazepam, molsidomine, naftopidil, nicergoline, nicorandil, obinutuzumab, pentoxifylline, phosphodiesterase-5 inhibitors, prostacyclin analogues, quinagolide. Decreased levels/effects w/ amphetamines, brigatinib, bromperidol, herbs (hypertensive properties), methylphenidate, NSAIDs, yohimbine.