AChR

Ethyl (triphenylphosphoranylidene) acetate (Triphenylcarbethoxymethylenephosphorane, (Carbethoxymethylene)triphenylphosphorane) may act as an inhibitor of cholinesterase that inhibits AChE and BChE.

Lobelin sulphate (Lobeline sulfate, Bantron) is an alkaloid that has actions similar to nicotine on nicotinic cholinergic receptors but is less potent. It has a variety of therapeutic uses including in respiratory disorders, peripheral vascular disorders, insomnia, and smoking cessation.

Thonzylamine (Neohetramine) is an antihistamine and anticholinergic drug.

Varenicline (CP 526555, Chantix, Champix,CP 526555 dihydrochloride) dihydrochloride is a potent, partial agonist of α4β2 nicotinic acetylcholine receptor (nAChR) and α3β4 nAChR with EC50 of 2.3 μM and 55 μM, respectively. Varenicline dihydrochloride is a potent, full agonist of α7 nAChRs with EC50 of 18 μM. Varenicline is a prescription medication used for smoking cessation.

α-Conotoxin GI, a 13-residue peptide originally isolated from the venom of the fish-hunting cone snail Conus geographus, acts as a competitive antagonist for the muscle-type nicotinic acetylcholine receptor (nAChR) with excellent selectivity for α/δ receptor subunit binding over α/γ.