Pulmonary Eosinophilia mephenesin, sulfonamides, penicillin, and imipramine but is most commonly associated with nitrofurantoin. Idiosyncratic Lidocaine therapy may precipitate respiratory arrest. This effect is probably mediated through the respiratory center. The aminoglycoside antimicrobials block nicotinic receptors in skeletal muscle and may precipitate respiratory arrest, particularly in the presence of other skeletal muscle blockers and gaseous anesthetics. The rapid adminsitration of certain drugs in propylene glycol may precipitate sudden, usually brief respiratory arrest in ruminants.
Expectorants are a logical part of therapy for a variety of respiratory tract conditions.
However, efficacy in a clinical setting has never been proven. Cough suppressants are largely derived from opiate and opiate-like drugs. Bronchodilators - drugs which relax smooth muscle of the lower airways. There is no reason to think that these would not work in veterinary patients but they are difficult to use.