Stigmin

Part of speech: noun

Definitions

1. A synthetic drug that blocks the breakdown of acetylcholine, used chiefly to treat muscle weakness in myasthenia gravis
2. A medicinal compound that inhibits cholinesterase, helping nerve signals reach muscles and reversing the effects of certain muscle relaxants
3. A cholinesterase-inhibiting medication given to strengthen muscle contraction in conditions such as myasthenia gravis

Etymology: "Stigmin" belongs to a family of drug names built on "Physostigma," the genus of the Calabar bean, a West African climbing plant. Its seeds contain physostigmine, the alkaloid that Scottish and European physicians studied in the 1800s. The genus name combines Greek "physa," meaning bellows or bladder, with "stigma," meaning mark or spot. The "stig-" element therefore points back to a plant-derived compound, and later chemists reused it for related drugs. Drugs in this group, including neostigmine and the older trade names of the same type, were developed to block the enzyme that breaks down acetylcholine, the chemical messenger that triggers muscle contraction. Keeping that chemical action in place helps muscles respond better when they are weak. The name stayed in use because pharmacologists wanted to signal a shared structure and mechanism. I am less certain of the exact coinage date for this particular spelling, so treat the specific history of that brand name as unconfirmed.