Kaopectate - can be used to treat diarrhea and is extremely safe. Though it's fine for mild cases, it doesn't actually treat the diarrhea; it just bulks up the stool to give the appearance normally
Pepto-Bismol-(safe but!)Acts as an anti-inflammatory for the stomach and intestines. Since one of the ingredients is a form of aspirin, it should never be given to dogs for more than once or twice. And if your dog has diarrhea that doesn’t clear up after two doses stop giving him Peto and seek a vet's advice.
Pepcid and Zantac- Are commonly used antacids. They both are very effective in dogs with upset stomach and ulcers. Owner the long term, however, they will eventually stop working, so you should either give your dog some time off from them, or change drugs periodically.
Benadryl- Is an antihistamine that’s used to treat everything from bee stings to allergic reactions. It’s a mild medication and doesn’t work for severe reactions, but is very safe for dogs, and is inexpensive. Just as it is with humans, Benadryl can cause some mild sedation in dogs -although in rare cause’s excitability.
Dramamine- Is an excellent medication for preventing car sickness in dogs. It also causes sedation, which might be rather welcome when you're taking on a long car trip.
Cortisone Cream- should be in every first aid box. It can be very effective on minor itchy areas and red bumps caused by bed bugs bites. Be sure to rub it in well and try to prevent your dog from licking it off.(although a little licking is not a serious danger.)
Neosporin- is one of the most underappreciated medications in the drug store. It moisturizes wounds to help them heal faster while also preventing infection. It’s important to remember to clean any wounds before applying Neosporin.