- Bismuth subsalicylate (2 brand names: Kaopectate, Pepto-Bismol). It may help treat some types of nausea and vomiting, such as from gastroenteritis (stomach flu). It’s also used for upset stomach and as an antidiarrheal (medicine to treat diarrhea).
- Antihistamines. Certain types may help prevent nausea and vomiting caused by motion sickness. These include dimenhydrinate (brand name: Dramamine) and meclizine hydrochloride (brand name: Dramamine Less Drowsy).
The quote overhead includes more symptoms for Bismuth subsalicylate (which I've colored in grey) than Antihistamines. So does Bismuth subsalicylate help with more symptoms than Antihistamines?
Does Bismuth subsalicylate cover broader types of nausea and vomiting? For antihistamines, the quote overhead appears to qualify "nausea and vomiting" to "nausea and vomiting caused by motion sickness".
How else do these two differ?