There are described new 1-alkyl-1-methyl-4-[(2,2-diphenyl-2-propoxy)acetoxy]piperidinium halides and pharmaceutical compositions comprising a 1-alkyl-1-methyl-4-[(2,2-diphenyl-2-propoxy)acetoxy]piperidinium halide as an active ingredient. These products are non-selective muscarinic acetylcholine receptor antagonists acting in the periphery and not in the brain.