papaverine

A nonaddictive opium derivative, C₂₀H₂₁NO₄, used medicinally to relieve spasms of smooth muscle.

An alkaloid (C₂₁ H₂₁NO₄) contained in opium.

An alkaloid found in opium. It has a weaker therapeutic action than morphine.

A non-addictive derivative of opium used in medicine to relieve muscle spasms, as a vasodilator and in some forms of erectile dysfunction.

an alkaloid medicine (trade name Kavrin) obtained from opium; used to relax smooth muscles; it is nonaddictive