[1] It acts by combining with the cholinergic receptor sites in muscle and competitively blocking the transmitter action of acetylcholine.

[2] Gallamine is a non-depolarising type of blocker as it binds to the acetylcholine receptor but does not have the biological activity of acetyl choline.

Gallamine triethiodide has a parasympatholytic effect on the cardiac vagus nerve, which causes tachycardia[3][4] and occasionally hypertension.

Gallamine triethiodide was commonly used to prevent muscle contractions during surgical procedures, but is now superseded by new neuromuscular blocking drugs with less side effects.

[5] The drug is no longer marketed in the United States, according to the FDA Orange Book.