Question: what over the counter medicine can dogs have?
Answer: Antihistamines. Benadryl (diphenhydramine), Zyrtec (cetirizine), and Claritin (loratadine) are commonly used antihistamines that relieve allergy symptoms or counteract allergic reactions. ... 
Tylenol, Ibuprofen, buffered aspirin. ... 
Dramamine. ... 
Hydrogen peroxide. ... 
Pepto-Bismol. ... 
Imodium. ... 
Kaopectate. ... 
Cough medications.