Pepsin: exceedingly useful in preventing attacks in dyspeptic subjects.
Physostigma.
Pilocarpine Hydrochlorate: in spasmodic asthma, subcutaneously; also in humid asthma if there is no cardiac dilatation.
Potassium Bromide.
Potassium Cyanide.
Potassium Iodide: in large doses when asthma is due to acute bronchial catarrh.
Potassium Nitrate: inhalation of fumes of paper relieves paroxysm. Sometimes advisable to mix a little chlorate with it.
Potassium Nitrite.
Pyridine: in bronchial asthma, vapor to be inhaled.
Quebracho: good in nephritic and spasmodic asthma.