Combination with nitrates (nitroglycerine, nitrosorbide, joint, etc.), calcium channel blockers (nifedipine, Corinfar, etc.), beta-blockers (anaprilin, metoprolol, talinolol and others), ganglion blockers (pentamine, etc.), diuretics (furosemide, hypogiazide, etc.), myotropic antispasmodics (dipyridamole, eufillin, etc.) enhances the hypotensive effect of these drugs.
Simultaneous use with other non-narcotic analgesics can lead to mutual enhancement of toxic effects.
Joint application with adsorbents, astringents and enveloping agents reduces the absorption of the drug in the gastrointestinal tract.