a friend of ours has a phd in radiology and runs asecs surgery radiology dept and taught at the ohio state university she is the one that said NO pepto as it has the aspirin and sulcrulfate is pepto without the aspirin and better to use -- not sure on the kaopectate as have never used that or asked about it with vets as have not needed to.
the aspirin i have heard that is safe is the one sold at petsmart for dogs
Vetrin Aspirin: Pet Joint Pain Medication For Dogs - 1800PetMeds