Ranitidine side effects include conditions such as bloating, constipation, decreased appetite, acid reflux, heartburn, rash, and dizziness. Ranitidine is an acid suppressant and is used clinically for diseases such as peptic ulcer bleeding and perioperative prevention of rebleeding. This product in the process of taking may appear certain side effects, such as causing heartburn, nausea, acid reflux, constipation and other gastrointestinal discomfort, as well as dizziness, body weakness, headache and other neuropsychiatric reactions, most patients are able to tolerate, so there is no need to stop the drug. Note that the use of drugs need to be taken under the guidance of a doctor, not to be used on their own, with severe renal impairment, as well as allergy, should be used with caution.