title: Letter: Stability of aspirin in propoxyphene compound dosage forms.
mesh_terms: D001241:Aspirin; D011431:Dextropropoxyphene; D004304:Dosage Forms; D004338:Drug Combinations; D004355:Drug Stability
chemical_list: D004304:Dosage Forms; D004338:Drug Combinations; D001241:Aspirin; D011431:Dextropropoxyphene