Ranitidine for acid reflux. This leaflet is about the use of ranitidine for acid reflux. This leaflet has been written for parents and carers about how to use this medicine in children. Ranitidine, sold under the trade name Zantac among others, is a medication which decreases stomach acid production. It is commonly used in treatment of peptic ulcer disease , gastroesophageal reflux disease , and Zollinger–Ellison syndrome. [1] PubMed Citation (55 year old developed jaundice following treatment with 1 week of ranitidine and 1 week of famotidine [bilirubin 7.1 mg/dL, ALT 305 U/L, Alk P 182 U/L], with rapid resolution on stopping). Dr. Syal responded: Zantac (ranitidine). 1 mg per kilo per dose given twice daily. Assuming weight of five yrs old is 45lbs, ( roughly 20 kilos), dose of Zantac ( ranitidine ) is 20 mg by mouth twice daily. My doctor has prescribed ranitidine for my dd who is 2. It tastes disgusting and makes her gag. Anyone have any good ideas to help it go down? She's The Bottom Line. Up to 70% of infants vomit at least once a day until they are four months old. They may suffer from gastroesophageal reflux. Sometimes doctors prescribe ranitidine for these babies. 1. Aliment Pharmacol Ther. 2002 May;16(5):899-907. Ranitidine, 75 mg, over-the-counter dose: pharmacokinetic and pharmacodynamic effects in children with symptoms of gastro-oesophageal reflux. 1 year old took an adult zantac? my very sneaky 13 month old just took a Zantac150 I tried to get it out of his mouth but he swallowed, I tried to gag him to get him to throw it right back up, but nothing. Detailed Ranitidine dosage information for adults and children. Includes dosages for Gastroesophageal Reflux Disease, Dyspepsia, Gastric Ulcer and more; plus renal, liver and dialysis adjustments. Other metabolites are the S-oxide (1%) and the desmethyl Ranitidine (1%). The remainder of the administered dose is found in the stool. Studies in patients with hepatic dysfunction (compensated cirrhosis) indicate that there are minor, but clinically insignificant, alterations in Ranitidine half-life, distribution, clearance, and bioavailability.