ZANTAC® (ranitidine hydrochloride) Injection. ZANTAC® (ranitidine hydrochloride) Injection Premixed. DESCRIPTION. The active ingredient in ZANTAC Injection and ZANTAC Injection Premixed is ranitidine hydrochloride (HCl), a histamine H2-receptor antagonist. It appears that basal-, nocturnal-, and betazole-stimulated secretions are most sensitive to inhibition by Zantac, responding almost completely to doses of 100 mg or less, while pentagastrin- and food‑stimulated secretions are more difficult to suppress. Phosphate Binders. It's important to control phosphorus levels for dogs with kidney disease. The goal is to maintain blood phosphorus levels below 4.5 for dogs with early-stage kidney disease (creatinine up to 2.0), 5.0 for dogs with moderate-stage kidney disease (creatinine 2.1 - 5.0), and 6.0 for dogs with late-stage kidney disease. It’s vital that you take the time to find out the correct dose of any medication before giving it to your dog. Below is a comprehensive list of medicine for dogs. On each page you will find details of the Find patient medical information for Zantac Maximum Strength Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. The drug ranitidine, better known under its marketed name “Zantac”, is a H2 histamine blocker commonly used to treat stomach upset, acid reflux, heartburn and peptic ulcers in dogs, the reduction in stomach acid allowing gastric ulcers time to heal. What is Atopica (cyclosporine capsules) for Dogs? Atopica for Dogs is used to treat atopic dermatitis (commonly called skin allergies) in dogs. How to use Zantac 150 Efferdose Packet. Dissolve each dose in 6 to 8 ounces (180 to 240 milliliters) of water before drinking. Do not chew or swallow the tablets whole. Benadryl, known by the generic name of diphenhydramine, can be used in dogs and cats for allergies, and for motion sickness in dogs; however, check with your vet to get the ok AND the right dose. Zantac is the brand name of the drug ranitidine, which is used to treat stomach and digestive problems. The drug is prescribed for conditions such as gastroesophageal reflux disease (GERD), ulcers.