hyoscyamine(redirected from Levsin)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Levsin: levis, Bentyl
An alkaloid found in hyoscyamus, belladonna, Duboisia, and stramonium; the levorotatory component of the racemic mixture atropine; used as an antispasmodic, analgesic, and sedative; hyoscyamine hydrobromide is used for the same purposes.
hyoscyamine/hyo·scy·amine/ (hi″o-si´ah-mēn) an anticholinergic alkaloid that is the levorotatory component of racemic atropine and has similar actions but twice the potency; used as an antispasmodic in gastrointestinal and urinary tract disorders, as the base or hydrobromide or sulfate salt.
A poisonous white crystalline alkaloid, C17H23NO3, isometric with atropine and having similar uses but more potent effects.
indications It is prescribed in the treatment of hypermotility of the GI and lower urinary tracts and is used preoperatively to reduce secretions and block vagal inhibitory effects on the heart.
contraindications Narrow-angle glaucoma, asthma, obstruction of the genitourinary or GI tract, severe ulcerative colitis, or known hypersensitivity to this drug prohibits its use.
adverse effects Among the more serious adverse effects are blurred vision, central nervous system effects, tachycardia, dry mouth, decreased sweating, and hypersensitivity reactions.
An alkaloid found in hyoscyamus, belladonna, Duboisia, and stramonium; used as an antispasmodic, analgesic, and sedative; hyoscyamine hydrobromide is used for the same purposes.
hyoscyamineAn ATROPINE-like drug used to relax smooth muscle spasm, as in colic, and for its sedative effect.
Alkaloid; used as an antispasmodic, analgesic, and sedative.
an anticholinergic alkaloid usually obtained from species of the plant Hyoscyamus and other solanaceous plants. It is the levorotatory component of atropine with actions and uses similar to those of atropine but with more potent effects.