Your dose may depend on several personal factors. You should consult with your doctor to find out the dose that is best for you. The dose of
Cimetidine depends on the following factors:
- patient's age
- patient's weight
- patient's health
- the health of the patient's liver
- medicines recommended by your doctor
- any other medicines in use
- herbal supplements consumed
- response to treatment
Cimetidine Dosage
Adult
- Recommended: 800 mg/day at bedtime or 200 mg three times a day with meals, or 400 mg at bedtime (1 g/day) and, if inadequate, 400 mg four times a day (1.6 g/day) with meals and at bedtime for 4-6 weeks
- Maximum: 2400 mg/day (2.4 g/day)
Children (children more than one year old)
- Recommended: 25-30 mg/kg (11.4-13.6 mg/lb) body weight per day in divided doses
Children (infants under one year old)
- Recommended: 20 mg/kg (9.09 mg/lb) body weight per day in divided doses
Adult (long-term treatment of gastric secretion or active non-cancerous (benign) stomach ulcers to prevent relapse in adults)
- Recommended: 400 mg at bedtime or 400 mg in the morning and bedtime
- Maximum: 2400 mg/day (2.4 g/day)
Adult
- Recommended: 400 mg four times a day, with meals and at bedtime for 4-8 weeks
- Maximum: 2400 mg/day (2.4 g/day)
Adult
- Recommended: 400 mg four times a day and the dose may be increased further in occasional cases. If Cimetidine cannot give immediate symptoms relief, antacids can be given to all patients until symptoms disappear
- Maximum: 2400 mg/day (2.4 g/day)
Adult (stomach or intestinal bleeding due to stress ulcers in seriously ill patients)
- Recommended: 200-400 mg every 4-6 hours
- Maximum: 2400 mg/day (2.4 g/day)
Adult (patients at risk of acid aspiration before general anesthesia (Mendelson's syndrome) particularly in obstetric patients during labor)
- Recommended: 400 mg should be given 90-120 minutes before induction of general anesthesia. If risk persists, dose may be repeated at four hourly intervals
- Maximum: 2400 mg/day (2.4 g/day)
Adult
- Recommended: 400 mg twice a day
- Maximum: 2400 mg/day
Adult (the breakdown of pancreatic enzyme supplements in patients with pancreatic insufficiency)
- Recommended: 800-1600 mg a day according to response, in 4 divided doses, one to one and a half hours before meals
- Maximum: 2400 mg/day (2.4 g/day)
Dosage calculation for children
To calculate the dosage for children please use the
weight based dose calculator to calculate the appropriate dosage as per the weight of your child.
Forms
Tablet
Strength: 100 mg, 200 mg, 300 mg, 400 mg, 600 mg, 800 mg
Tablet, film coated
Strength: 200 mg, 300 mg, 400 mg, 800 mg
injection, solution
Strength: 150 mg/1ml, 6 mg/1ml
Solution
Strength: 300 mg/5ml, 150 mg
Liquid
Strength: 6 mg, 60 mg, 150 mg, 300 mg
Missed Dose
A missed dose should be taken as early as you remember it. However, if the time for the next dose is almost there, then the missed dose should be skipped, and the regular dosing schedule should be continued. Avoid taking a double dose.
Overdose
What to do if you overdose on Cimetidine?
Inducing vomiting or cleaning out of the stomach content (gastric lavage) methods may be used to treat an overdosed person. According to the symptoms, general supportive measures should be performed in case of overdose.
If you think you have overdosed on Cimetidine, call a poison control center immediately. You can look up the poison control center information from the
Poison Center Finder at TabletWise.com.