Cimetidine Capsules belongs to Hâ‚‚ receptor antagonist, has the effect of significantly inhibiting the diurnal basal gastric acid secretion, but also inhibit the gastric acid secretion induced by food, pentagastrin and so on, used to relieve gastric pain caused by excessive gastric acid secretion, heartburn (heartburn), acid reflux and so on. Cimetidine capsule is currently one of the drugs of choice for the treatment of peptic ulcer. Cimetidine capsules can make the acidity in the stomach lower, improve the discomfort symptoms experienced by patients, but also play a role in protecting the gastric mucosa. Common adverse reactions when taking cimetidine capsules include diarrhea, dizziness, fatigue, headache and rash, etc. Occasionally, there are adverse reactions such as dry stools, drowsiness and body aches. Allergic to the components of the drug is prohibited, pregnant and lactating women are prohibited, patients with acute pancreatitis is prohibited, so as not to aggravate the condition. After the emergence of uncomfortable symptoms, it is recommended to consult a doctor in a timely manner to clarify the etiology of the disease and targeted treatment under the guidance of the doctor; should be taken strictly according to medical advice, in order to avoid the emergence of adverse effects.