H2-receptor antagonist
Famotidine dosage guide: how much to take and when
Choosing the right dose of Famotidine (Famotidine) is the most important practical decision after starting therapy. Famotidine is supplied as tablet, orally disintegrating tablet, oral suspension in 10mg, 20mg, 40mg, and the right dose for a given person depends on the indication, age, comorbidities and tolerance to the active ingredient Famotidine.
Starting dose and titration
According to the prescribing information, most adults begin Famotidine at the lowest available strength of 10mg, 20mg, 40mg and titrate up only if symptom control is insufficient and tolerability is good. Higher doses are reserved for selected cases. Older adults, people with renal or hepatic impairment, and those taking interacting medications should usually start at the lowest dose.
When to adjust
Dose adjustment is guided by symptom response and side effect burden, not by arbitrary schedules. Famotidine reversibly and competitively blocks histamine H2 receptors on gastric parietal cells, reducing both basal and stimulated gastric acid secretion. If side effects are limiting at a given dose, going down a step is usually preferred over stopping abruptly. If the response is incomplete after several weeks, a higher dose can be tried under medical supervision.
Frequently asked questions
What is the standard starting dose of Famotidine? ▾
Most adults start Famotidine at the lowest strength of 10mg, 20mg, 40mg, with adjustment based on symptom response and tolerance. Older adults and those with reduced kidney or liver function generally start lower. The prescriber decides the exact starting dose for each person.
Can I take a higher dose of Famotidine if it isn't working? ▾
Higher doses of Famotidine should only be used after consulting the prescriber. Doubling on your own is unsafe, especially with active ingredients in the H2-receptor antagonist class. The prescriber can confirm whether titration is appropriate or whether the medication needs to be changed.
Products containing Famotidine
More on Famotidine
- With alcoholFamotidine and alcohol — is it safe to drink?
- With foodShould Famotidine be taken with food?
- Side effectsFamotidine side effects: common, rare and warning signs
- OnsetHow fast does Famotidine start working?
- DurationHow long does Famotidine last?
- Missed doseWhat to do if you miss a dose of Famotidine
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.