Pentamine is a

ganglionic blocker A ganglionic blocker (or ganglioplegic) is a type of medication that inhibits transmission between preganglionic and postganglionic neurons in the autonomic nervous system, often by acting as a nicotinic receptor antagonist. Nicotinic acetylcholin ...

References

Nicotinic antagonists Quaternary ammonium compounds Tertiary amines Ethyleneamines {{nervous-system-drug-stub