GERD Home > Answers to Questions on Cimetidine

What Should I Do If I Miss a Dose?

Many people take cimetidine only when they need it. However, for those who take it on a daily basis, if you do not take your cimetidine as scheduled, take your next dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not take a double dose of cimetidine.


Generic prescription cimetidine is available in the following strengths:
  • Cimetidine 300 mg tablets
  • Cimetidine 400 mg tablets
  • Cimetidine 800 mg tablets
  • Cimetidine solution -- 300 mg per 5 mL (300 mg per teaspoonful).
Prescription Tagamet is no longer being made.
Over-the-counter cimetidine is available as Tagamet HB 200 mg tablets. Cimetidine is also available in an injectable form for use in hospitals.

Generic Cimetidine

Currently, generic prescription cimetidine tablets, cimetidine solution, and over-the-counter cimetidine tablets are licensed for sale.
(Click Generic Tagamet for more information.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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