Ranitidine for cats dosage

Ranitidine Rx

Ranitidine HCl (Zantac®) for Dogs and Cat

Side Effects. Ranitidine and other H2 receptor antagonists are considered very safe drugs with few side effects. They should be used with caution or at a reduced dose in geriatrics or animals with decreased liver or kidney function. Dogs and Cats: Rare: Mild diarrhea, nausea, vomiting, and mental confusion, especially in older patients What dose of zantac can I give my cat as he was on medication and now he is throwing up because of it. My vet says gravol but I would like to give him zantac to help heal his stomach not just stop him from throwing up. The vet has never heard of zantac which I find really strange. Submitted: 9 years ago

Medication must never ever be administered without first consulting your veterinarian. The typical dosage of famotidine administered is 0.25 to 0.5 mg per pound (0.5 to 1.0 mg/kg) every 12 to 24 hours. The duration of administration depends upon the condition being treated, reaction to the medication and the development of any negative effects Dosage varies from cat to cat; underlying health problems must be taken into consideration when deciding the safe dose. A typical dose regime is 0.25 to 0.5 mg per pound or 0.5 to 1.0 mg/kg every 12 to 24 hours Ranitidine tablets have been around for yonks - trouble is, the smallest mainstream form you can get is 75mg. The average cat needs around 15-20mg, so it's an awkward dose. This is probably what the vet meant when she said it was only available in liquid form - probably just from a logistical point of view Which concludes rather brutally: 'Only twice-daily PO administered omeprazole significantly suppressed gastric acidity in healthy cats, whereas once-daily omeprazole and standard dosages [1.5-2.3mg/kg q12hrs] of ranitidine were not effective acid suppressants in cats.'. Ranitidine is generally considered to be more potent an H2 blocker than.

Ranitidine - Ca

-Intermittent IV bolus injections should be diluted up to 2.5 mg/mL and injected at a rate of up to 4 mL/min. -Intermittent IV infusions should be diluted up to a concentration of 0.5 mg/mL and infused at a rate of up to 5 to 7 mL/min (approximately 15 to 20 minutes) Ranitidine and nizatidine are histamine H 2-receptor antagonists that are prokinetics in addition to inhibiting gastric acid secretion in dogs and rats. Their prokinetic activity is due to acetylcholinesterase inhibition, with the greatest activity in the proximal GI tract Treatment of Duodenal and Gastric Ulcers: The recommended oral dose for the treatment of active duodenal and gastric ulcers is 2 to 4 mg/kg twice daily to a maximum of 300 mg/day. This recommendation is derived from adult clinical trials and pharmacokinetic data in pediatric patients The usual dosage of ranitidine for dogs is 0.25 to 1 mg per pound every 8 to 12 hours. It can be given orally or in the form of an injection. It's available in regular tablets or dissolvable. The effect of orally administered ranitidine and once-daily or twice-daily orally administered omeprazole on on intragastric pH in cats (2015) Šutalo S, Ruetten M, Hartnack S, Reusch CE & Kook PH Journal of Veterinary Internal Medicine 29(3) pp840-6 used a dosage of 1.1-1.3 mg/kg, in which case a 10 lb (4.5kg) cat would receive 5 to 5.85 mg

Over the-counter medications for pets

ranitidine dosage cats - MedHel

  1. While the Zantac dosage for dogs will depend on the individual, the general guideline will be somewhere between 0.25 and 1 mg of ranitidine per every pound of the animal to be taken every 8 to 12 hours. Zantac tablets come in dosages of 75 mg, 150 mg and 300 mg, with injections differing according to their solution
  2. e 2 blocker used to reduce acid production in the gastrointestinal tract in order to treat or prevent stomach or intestinal ulcers, stomach inflammation and erosion due to kidney disease, stress or drug reactions, acid reflux, or esophageal inflammation
  3. Buy Ranitidine and other Medications from top brands at 1800PetMeds and save. Free shipping on orders over $49
  4. e receptor-2 (H-2) blocker class. Cimetidine and other H-2 blockers are useful for the treatment and prevention of stomach and intestinal.

Ranitidine is considered safe for dogs aside from the side effects discussed. If your dog ate a Zantac 150 or Zantac 75 tablet, he may experience unpleasant symptoms such as diarrhea and vomiting. A larger dose may lead to rapid breathing, muscle tremors, and restlessness. You should contact your vet immediately to discuss the amount your dog. The famotidine dosage most often recommended for the treatment of dogs is 0.25 to 0.5 mg/lb administered twice daily. Even though the medicine is available over-the-counter it's still a good idea to seek your vet's approval first. Refer to the chart below to find the typical dosage for your dog's weight. 10 mg is the most common strength. Health A2Z Maximum Strength 150 mg Acid Reducer. Our pick for the best maximum strength ranitidine for dogs - this contains 150 mg. $20.99 USD. For the best maximum strength ranitidine for dogs, we selected the A2Z Maximum Strength 150 mg Acid Reducer. This product contains 150 tablets, within a tamper-proof bottle Zantac dosage for dogs Zantac is often used in dogs at dosages of 0.25 to 1 mg per pound, administered once every 12 hours (twice daily). When buying Zantac to give to your pet dog, you should choose the formulation with the lowest dose tablets, preferably scored down the middle for easy splitting

Background: Gastric acid suppressants frequently are used in cats with acid-related gastric disorders. However, it is not known if these drugs effectively increase intragastric pH in cats. Objectives: To examine the effects of PO administered ranitidine and omeprazole on intragastric pH in cats and to compare the efficacy of once-daily versus twice-daily dosage regimens for omeprazole Find details on Ranitidine. Medication for cats including uses, administration, pharmacokinetics, precautions, adverse reactions and more. All information is peer reviewed Ranitidine is in a class of drugs called H2 receptor antagonists. It is used to decrease the amount of stomach acid produced. This aids in the treatment of ulcers that are present and helps prevent ulcer formation in dogs and cats. It is also used in the treatment of gastritis (inflammation of the stomach), esophagitis (inflammation of the. Ranitidine is useful in any situation where stomach irritation is an issue and ulceration is a concern. It is often used in the treatment of Helicobacter infection, inflammatory bowel disease, canine parvovirus, ingestion of a toxin that could be ulcerating (over dose of aspirin, for example), any disease involving protracted vomiting, or chronically in combination with medications which may.

An alternative medication is ranitidine (Xantac Rx), which seems to have similar effects in some cats. The usual dosage of cisapride is 1.25 to 2.5mg given 15 to 30 minutes prior to eating and the dosage of ranitidine is 1 to 2mg/kg every 12 hours. Mike Richards, DVM 1/15/2001 Megacolon/Perineal hernia. Question: Hi there. When my kitty, Baby. Therapy of Gastrointestinal Ulcers (Monogastric) GI ulceration is a common problem in small and large animals, in association with physiologic stress (endogenous cortisol), dietary management, or as a sequela of administration of ulcerogenic drugs (see Gastrointestinal Ulcers in Small Animals and see Gastrointestinal Ulcers in Large Animals ) Pharmacokinetic studies in cats have shown that the median half-life of oral mirtazapine is 9.2 hours for the 1.88-mg dose and 15.9 hours for the 3.75-mg dose in normal young animals; this is much shorter than originally postulated. 5 When a 1.88-mg dose was given to young normal cats daily, no significant drug accumulation occurred. 5.

Ranitidine medication guide - VetDepo

  1. opromazine: Smooth muscle relaxant: 2.0-4.5 mg/kg: PO: q 12hrs: 5-a
  2. Purchase the 5 mg tablets for cats. Only use plain Zyrtec (cetirizine) for cats. NEVER use Zyrtec-D due to the potential for serious side effects! The dose for cats is 5 mg per day. The dose can be split in two by giving 2.5 mg (1/2 tablet) twice daily. If you opt for twice daily dosing, invest in a pill cutter to assure that the dose is accurate
  3. e receptor antagonists, cimetidine and ranitidine, were compared for their abilities to control acid secretion on a short- and long-term basis in 13 patients with gastric hypersecretory disorders. The rate of onset of action did not differ between the two drugs. The actions of both dr
  4. The normal dosage for Ranitidine (Zantac) is 0.25 to 1 mg per pound of body weight every 8 to 12 hours. You could give your dog (1) 75mg tablet. This is given for acid reflux in dogs. I will supply you with a website that gives further information on the Ranitidine and its useage in pets. Joa
  5. What Is The Dose Rate Of Metronidazole In Cats? The recommended dose rate is usually 10 mg/kg twice daily, orally or intravenously, but in some cases, doses as high as 25mg/kg may be recommended. For a 5kg cat, 10mg/kg equates to 50mg (a quarter of a 200mg tablet, or 1.25ml of oral suspension)

Ranitidine is effective in decreasing gastric acid in cats. 22 Ranitidine would be a logical choice in a cat with gastrointestinal ulceration and/or atony. The reported dosage recommendation for ranitidine in cats is 3.5 mg/kg orally every 12 hours or 2.5 mg/kg intravenous every 12 hours. 1 Ranitidine oral tablet is a prescription drug that's used to treat conditions such as stomach ulcers, gastroesophageal reflux disease (GERD), and conditions where your stomach makes too much acid

Ranitidine VCA Animal Hospita

Contraindications. Hypersensitivity to ranitidine or components of the formulation. Cautions. If gastroesophageal reflux disease does not respond adequately in 6-8 weeks, do not increase dosage; prescribe proton pump inhibitor instea Ranitidine for cats, dogs, and horses may be used to reduce stomach acid production in these animals. Ranitidine for animals may be used to aid in the treatment of existing ulcers and help prevent future ulcer development. Ranitidine, brand name of Zantac, may be used in dogs for the treatment of reflux or to reduce inflammation of the. Ranitidine is a medicine that belongs to a group of drugs known as histamine H-2 blockers. This medicine is commonly used in human beings to help prevent or reduce ulcers that develop in the stomach and intestinal tract. Although the drug is officially only approved by the FDA for use in human beings, it can also be put to effect in canine systems as well Famotidine is a non-prescription medication not FDA approved for veterinary use; however, it is a commonly accepted practice for veterinarians to use this medication in dogs and cats to reduce the amount of stomach acid produced. Famotidine is available as packages containing 30 x 10 mg tablets

Ranitidine for Veterinary Use - Wedgewood Pharmac

Constipation. Flatulence. Diarrhea. However, these side effects occurred in only 1.5%-3% of human patients and most of these adverse effects are not observed in animals [5]. The same study used a case study of a Beagle which has been given omeprazole for 7 years and had shown no adverse side effects. However, if used in high enough doses. At a dose of 5 mg/kg, it increases the gastric pH of dogs to > 7 within 1 hour after administration. However, at a dose of 2 mg/kg (i.v. q12h), the effect of ranitidine on gastric pH is not different from saline. Therefore, current dose recommendations (0.5-2 mg/kg q8-12h) seem to be too low to be of any effect Cimetidine is an anti-ulcer drug belonging to the category of the histamine receptor- 2, (H-2) blocker.Though Cimetidine is not approved for use in animals, it could be legally prescribed by veterinarians as an extra-label drug. Cimetidine is used in dogs and cats to treat mast cell tumors, gastritis (inflammation of the stomach), esophagitis (inflammation of the esophagus), and gastric or. Find patient medical information for Heartburn Relief (ranitidine) oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings

Ranitidine is a prescription drug used to treat ulcers of the stomach and intestines and to prevent intestinal ulcers from coming back after they have healed. Ranitidine is also used to treat certain stomach and throat problems such as erosive esophagitis, gastroesophageal reflux disease or GERD, and Zollinger-Ellison syndrome.It works by decreasing the amount of acid your stomach makes Serious PPI side effects include kidney problems, bone fractures and gastric cancer. In contrast, H2 blockers like Zantac can only control acid for up to 12 hours. But ranitidine works in as little as 30 minutes, making it more effective for sudden heartburn. Common Zantac side effects are similar to those of PPIs Ranitidine and nizatidine stimulate gastric antral contractions at gastric antisecretory dosages (ranitidine, 1.0 to 2.0 mg/kg PO BID; nizatidine, 2.5 to 5.0 mg/kg PO BID) and may be useful as gastric prokinetic agents in dogs and cats. 43,44,4 Find patient medical information for Zantac-360 (famotidine) oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings Ranitidine can be used with surgery to improve gastric emptying. Side effects are rare when using ranitidine for dogs. Allergic reactions to this medicine can be serious and include symptoms such as difficulty breathing, swollen tongue or face, and intense itching

What dose of zantac can I give my cat as he was on

Ranitidine prescription and dosage sizes information for physicians and healthcare professionals. Pharmacology, adverse reactions, warnings and side effects 5g per 10 pounds of body weight. Oral. Keep at least 30 tablets available, give once and only under the direction of a veterinarian. Chlorhexidine Solution (Nolvasan, ect..) Antiseptic. Dilute to 0.05% (25ml to 2 quarts, 1.9Liters water) Topical. As prescribed for cleaning the wound Sucralfate is considered a relative safe medication to give to dogs and has very few side effects. The most common that occur include constipation, diarrhea, difficulty breathing, and hypophosphatemia, which have only been seen in a small percentage of users. and ranitidine, combined with sucralfate, which is a cytoprotective binding agent. Conversely, more ranitidine is absorbed through the digestive tract than famotidine, but it can take longer to work than famotidine. As a molecule, famotidine has the chemical formula of C 8 H 15 N 7 O 2 S 3, whereas ranitidine has the general formula C 13 H 22 N 4 O 3 S, and a hydrogen and chlorine atom can be tacked on to make a hydrochloride.

Pepcid AC for Cats: Using and Dosage Pet Healt

  1. imum of 50mg and a maximum of 100mg. Given once or twice a day. When dosage and/or frequency is flexible your veterinarian will be able to tell you which end of the scale your dog should be at
  2. ister 0.44 mg of famotidine every 12 hours. Never exceed the dosage unless advised otherwise by your vet. The dosage of Pepcid may depend on other factors aside from size alone, and.
  3. Dosage recommendations for dogs and cats are based on anecdotal experience. (0.5 mg/kg q12h) increased intragastric pH more and for a longer time compared to ranitidine (2 mg/kg q12h) based on continuous 24-hour intragastric pH measurements via gastrostomy tube. 41 Higher dosages of famotidine.
  4. The usual prednisone dosage that is prescribed for dogs is about 0.1 to 0.3 mg/pound of body weight. But there are some cases where the dosage is a lot more than that (even 1mg/pound of body weight). When this dosage is taken for a longer period, the blood sugar level rises, and this can lead to diabetes
  5. Please understand the fact that the dosage of zantac is not same for human beings and dogs. Most dogs are provided with the small dosage unless the dog size is enormous. One of the renowned vets, Walker Valley, has offered basic guidelines of the dosage of zantac based on the weight of the dog:
  6. e medication prescribed by veterinarians for the treatment of allergies in pets [1].It is known as a second-generation antihista
  7. Is Pepcid better than Zantac? Pepcid may have less side effects, or at least less severe side effects, than Zantac. Can I take ranitidine and famotidine together? Generally, famotidine and ranitidine are not taken together as they have the same effect on the body. In fact, taking the two medicines together may increase the risk for side effects

Pepcid (Famotidine) For Cats - Cat-Worl

Any tips for administering ranitidine ? Pet Forums Communit

  1. The recommended dose ranges between 0.005 to 0.045 mg/lb or 0.01 to 0.09 mg/kg every 6 to 12 hours for anxiety or panic attacks in medium-sized dogs. In treatment for separation anxiety, an oral daily dose of 0.12 to 0.9 mg/lb three times a day is recommended
  2. side effects of zantac in dogs . By kerby1177203767 | 2 posts, last post 6 months ago. New Reply Follow New Topic. kerby1177203767 over a year ago. My dog has just been prescribed zantac by the vet. He has problems with stomach ulcers and the vet says that zantac is often used for dogs, even though it is not officially recognised as a canine drug
  3. Cats zantac dose This means that we are directly involved in the national investigation and discovery cats zantac dose will hopefully result in a positive outcome for the individuals injured by this drug. If you took Zantac and have been diagnosed with cancer, then we will be seeking the following damages for you: Past and future pain and.
  4. once-daily dosage regimen. Materials and Methods Cats Eight healthy European shorthair cats (2 intact females, 3 spayed females, 3 intact males), aged 5-6 years (median, 5.7 years) and weighing 4.3-6.8 kg (median, 5.3 kg) with median body condi-tion score of 5/9, were used. All cats were research colony cats
  5. istration, compared to an intravenous (IV) injection with mean peak levels of 440 to 545 ng/mL occurring 2 to 3 hours after a 150-mg dose. The oral solution is bioequivalent to the tablets. Absorption is not significantly impaired by the ad

Missed Dose. Give the dose as soon as possible. If it is almost time for the next dose, skip the missed dose, and continue with the regular schedule. Do not give your pet two doses at once. Side Effects and Drug Reactions. Antacids may result in these side effects: Loose stools with magnesium compounds; Constipation with aluminum or calcium. Ranitidine (Zantac 75) was commonly used to help treat gastric hyperacidity in CKD cats. However, it may also help with constipation caused by low motility in the colon, so was a popular choice for cats needing treatment for both constipation and gastric hyperacidity This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. See also: Side effects (in more detail) What other drugs will affect ranitidine? Before taking ranitidine, tell your doctor if you are taking triazolam (Halcion)

Side Effects & Possible Reactions. Though antacids are considered generally safe for most cats, side effects can include loose stools, constipation, or lack of appetite. Owners should use caution when giving antacids to pregnant or lactating cats. Long-term use of aluminum or calcium compounds (which some antacids contain) can also cause kidney. Zantac 360° has a new formula that's clinically proven to be safe and effective and contains the FDA-approved active ingredient famotidine — the #1 doctor recommended medicine approved to both prevent and relieve heartburn.*. Plus, it works in as little as 15 minutes and lasts up to 12 hours. †. Whether taken before you eat to prevent. Dosage information for OTC ranitidine (75mg) To treat heartburn or indigestion symptoms, adults aged 16 years and over should take one 75mg tablet with a drink of water. If your symptoms last for. However, these side effects happen in less than 1% of ranitidine users and usually only among those infants who are critically ill and on multiple medications. Cardiovascular problems: This is an extremely rare side-effect of ranitidine, which affects one in a million patients and only due to rapid dosage or overdose of ranitidine Dosage and treatment schedule. The recommended initial dose is 0.4 to 0.6 mg oclacitinib/kg bodyweight, administered orally, twice daily for up to 14 days. For maintenance therapy, the same dose (0.4 to 0.6 mg oclacitinib/kg bodyweight) should then be administered only once a day. The requirement for long-term maintenance therapy should be.

Ranitidine in dogs and cats: the evidence - Vet Practice

Company. Product. Lots Tested. NDMA level ppm. NDMA level (micrograms-mcg/tablet or oral dose) Sanofi Pharmaceutical. OTC Ranitidine 150mg. 19E413M, 19D554, 19A432U. Lead poisoning: 27.5 mg/kg SC qid or 13 mg/kg SC, IV qid for 5 days then every 2-3 days if necessary; based on successful treatment of two cases. General dose rate for cattle, dogs, and cats. Preparation should be diluted 1:4 in 5% glucose or 0.9% saline prior to use. (Varga, 2013) Spectinomycin: Antibiotic DO NOT USE DO NOT USE Causes diarrhea Risk of cancer appeared significantly lower with ranitidine versus famotidine for most individual cancers as well, with odds ratios of 0.54 to 0.99 and 95% confidence intervals below 1.0 for. The FDA recalled the heartburn medication ranitidine (Zantac) due to a possible cancer risk. Doctors share the best Zantac alternatives and replacement drugs You may report side effects to FDA at 1-800-FDA-1088.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345. PRECAUTIONS: Before using ranitidine, tell your doctor or pharmacist if you are allergic to it; or to other H2 histamine blockers (e.g., cimetidine , famotidine.

Beginners' Guide To Using Pepcid For Cats Pet Struggle

Dosage and administration. Oral use. The recommended dose is 1 mg telmisartan/kg body weight (0.25 ml/kg body weight). The product is to be administered once daily directly into the mouth or with a small amount of food. Semintra is an oral solution and is well accepted by most cats. The solution should be given using the measuring syringe. Ranitidine is just suggested for usage while pregnant when benefit exceeds danger. Before you take metoclopramide, inform your doctor if you have kidney or liver condition, heart disease, hypertension, diabetic issues, Parkinson's illness, or a background of anxiety You may report side effects to FDA at 1-800-FDA-1088.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345. PRECAUTIONS: Before taking ranitidine, tell your doctor or pharmacist if you are allergic to it; or to other H2 histamine blockers (e.g., cimetidine , famotidine.

Find everything you need to know about Zantac (Ranitidine), including what it is used for, warnings, reviews, side effects, and interactions. Learn more about Zantac (Ranitidine) at EverydayHealth. 13. Claritin (Loratadine) 14. Prednisone. 15. Zantac (Ranitidine) There's plenty of unsafe medicine for dogs that owners often consider giving their pets. These can be toxic due to physical and. But ranitidine and famotidine work in basically the same way - that is, both are proton pump inhibitors that decrease production of stomach acid. Famotidine is a much more potent drug, so the dosage (in humans) is generally about 8-10x more for ranitidine, which is why one ranitidine tablet is 75mg vs. 10mg for one famotidine tab Dosage Considerations - Should be Given as Follows: Children under 3 months: 0.5 mg/kg orally once daily for up to 8 weeks. Children 3-12 months: 0.5 mg/kg orally every 12 hours for up to 8 weeks. Children 12 years or older: 10-20 mg every 12 hours, may take 15-60 min before eating foods that could cause heartburn Intestinal Ulcer: In a multicenter, double-blind, measured, United States research of endoscopically detected intestinal ulcers, earlier healing was seen in the clients treated with Zantac as revealed in Table 6

The usual dosage of famotidine for dogs is 0.25 mg to 0.5 mg per pound of body weight given twice a day. Some forms of the drug are sold as over-the-counter medication, but you should not give it. Doctors will typically only prescribe either omeprazole or ranitidine, not both. Ranitidine is a type of medication called a histamine-2 blocker, and is used as a treatment for gastrointestinal reflux disease (GERD).This medication works by reducing the production of acid in the stomach, allowing the esophagus to heal the damage caused by excess acid Cyproheptadine For Cats Dosage - A month's worth of pills is available from wholesalers for less than $20. cyproheptadine for cats dosage Best Quality and EXTRA LOW PRICES, cyproheptadine cats dosage for. View this post on Instagram 'A New Product Introduction is an expensive and highly pressured project. Shortening the time to market is key. Zantac 150 Dosage Directions - A month's worth of pills is available from wholesalers for less than $20. zantac 150 dosage directions Best Quality and EXTRA LOW PRICES, directions zantac dosage 150. View this post on Instagram. A post shared by @ zub.13 on Oct 31, 2019 at 6:51am PDT

Cimetidine 200mg (100 Tabs) (Manufacture may vary)

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Cimetidine for Cats Pets - The Nes

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Starting dosage is 30 mg/kg (15 mg/lb) of body weight daily, split between and always given with meals, for dogs with early- to moderate-stage kidney disease when phosphorus levels are not higher than 6.0. T he amount of calcium may increase to as much as 100 mg calcium per kg of body weight if using calcium carbonate (60 mg/kg if using calcium. Aired Committee By Great Comments July On Swindle 2007 Buy Academy National On Earth I TV Science Dogs Can Where For 12 S For Warming On Zantac Television The Global The ABC System Program It's also good to make a mental note of the injury: date of injury, what you were doing, how it happened, what force and what angle was the force directed. Cerenia has few side effects and is well tolerated in large amounts in dogs who are at least 8 weeks of age (16 weeks if you use the motion sickness dosage). Dogs who received three times the travel sickness dose for long periods of time did not experience serious adverse effects, however, when doses of 40 mg/kg (18.2 mg/lb) to 50 mg/kg (22.7. The smallest tablet available is 7.5 mg, which would be the dosage for a 165-lb dog. You might be able to split the pills in half for an 80-lb dog, but smaller dogs would need to use the liquid form made for dogs in order to get the correct dosage. Giving too much increases the risks of side effects dramatically Side effects of Previcox for dogs. As with any medication, there are potential side effects, [8] but they're generally not too severe. The worst most pets will experience are minor digestive disturbances as their bodies adjust to the medication, and these will often be in the form of an altered bowel movement routine or a decrease in appetite Famotidine is a histamine-2 blocker that is used to treat and prevent ulcers in the stomach and intestines. It works by decreasing the amount of acid the stomach produces. Ranitidine is an H2-antagonist which is used to treat gastroesophageal reflux disease, Zollinger-Ellison Syndrome, and duodenal ulcer