OTC human medications are potentially life threatening to all pets, especially a puppy. Take your puppy to the vet now with all OTC medications he has eaten.

pseudoephedrine

All medications have side effects, as each of us is different.

See "idiosyncratic drug reactions".

By nature of medications being OTC, they are presumed safer than some prescription medications, taken in doses as recommended on the labeling.

Ephedrine

Pseudophed

Prescription Weight loss drugs Phentermine Bontril eg..

Benedrex

Such medications as ibuprofen and naproxen can also help reduce the bleeding and any cramping associated with it.