Acid, Nitric: in obstinate cases.
Acid, Salicylic.
Aconite.
Alcohol.
Alum.
Ammonium Carbazotate: one-half to one grn. in pill.
Ammonium Chloride.
Amyl Nitrite.
Antipyrine.
Apiol: in mild cases, 15 grns. during an hour, in divided doses, four hours before the paroxysm.