Dosage and Administration: Dogs/Cats: All weights Give 0.25 to 1 mg of Ranitidine for every pound of your pet's weight, every 8 to 12 hours. Horses: All Weights Give 5-10 mg /kg 2 to 4 times a day Cautions:Ranitidine should not be used in animals allergic to it. Use Ranitidine with caution in animals with heart, kidney, or liver disease. Use with caution in pregnant females. Possible Side Effects: For dogs and cats, if any of the following serious side effects occur, stop giving Ranitidine and seek emergency veterinary medical attention an allergic reaction difficulty breathing swelling of the lips tongue or face hives. Side effects are rare but may include diarrhea or irregular heartbeat. Other side effects may also occur. Talk to your veterinarian about any side effect that seems unusual or bothersome to the animal. Possible Drug Interactions:Notify your Veterinarian if your pet is being given antacids, acetaminophen, ketoconazole or itraconazole, metoprolol, nifedipine, propantheline, and long term use of Vitamin B12, as interactions can occur. Give Ranitidine 2 hours before or 2 hours after the other medications. When given with azathioprine, Ranitidine may further decrease white blood cell counts. Drugs other than those listed may also interact with Ranitidine. Talk to your veterinarian or pharmacist before giving any prescription or over the counter medicines including vitamins, and supplements..Active Ingredients Ranitidine 150 mg as ranitidine hydrochloride 168 mg Inactive Ingredients Collodial silicon dioxide, croscarmellose sodium, diethyl phthalate, FD&C yellow #6, hypromellose, iron oxide red, magnesium stearate, microcrystalline cellulose and titanium dioxide. Ranitidine HCl Tabs 300mg 100 Count Bottle. I do not receive this product or any others in exchange for this article, I do get a commission for readers clicking the buy now links which helps to differ the cost of hosting this blog and I sincerely hope this article site helps you with your search for Vet Approved Rx products.