Using over-the-counter (OTC) medications for dogs can be risky. While some human medications may be safe in certain circumstances, many can be toxic or harmful to dogs. Always consult your veterinarian before giving any medication to your dog, even if it's available over the counter. Some common OTC medications that are sometimes used under veterinary guidance include:

1. **Benadryl (Diphenhydramine)**: This antihistamine can be used for allergies or to calm anxious dogs. The typical dosage is 1 mg per pound of body weight, but again, consult your vet first.

2. **Pepcid (Famotidine)**: This medication can help with stomach issues and is sometimes used for dogs with acid reflux. The dosage is usually 0.5 mg per pound, but it’s crucial to get a vet’s approval.

3. **Aspirin**: Some veterinarians may recommend low-dose aspirin for pain relief, but it can cause stomach upset or bleeding. Always check with your vet before administering.

4. **Hydrogen Peroxide**: This is sometimes used to induce vomiting in dogs if they have ingested something toxic, but it must be done under veterinary guidance.

Remember, the safest approach is always to consult with your veterinarian before giving your dog any medication, whether it's OTC or prescription. They can provide specific recommendations based on your dog's health, weight, and any other medications they may be taking.

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Topics covered in this question:

Dog Health Dog Care Pet Safety Veterinary Advice Medications