Homeopathic therapeutics for Acidity symptoms from ABC Manual of Materia Medica and Therapeutics by G H Clarke….

Bismuth, five to twenty grains before and after meals, 65.

Caffeine, 70.

Hydrochloric acid, dilute, fifteen to sixty drops in water, through tube, before meals.

Magnesia. from twenty to sixty grains, 34.

Nux vomica, excellent in one-half to three drop doses, 153.

Salicylic acid, 26.

George Hardy Clark
Clark, George H. (George Hardy) 1860-1941 was the author of: Homeopathic Treatment of Asthenopia; Lee and Clark's Cough and expectoration : a repertorial index of their symptoms; The A B C Manual of Materia Medica and Therapeutics; A system for the care and training of children; The Black Plague and Its Control.