Peak effects are reached within one to three hours of taking a dose. Symptomatic relief for GERD occurs within 24 hours after starting therapy with famotidine. One dose of L pill substantially inhibits the secretion of gastric acid for 10 to 12 hours. Food does not appear to affect the absorption of famotidine or peak concentrations.
To treat heartburn and acid indigestion, take 1 tablet or capsule with a glass of water as needed, unless otherwise directed by your doctor. Swallow the tablets and capsules whole without chewing. If you are using the chewable tablets, chew completely and swallow one tablet as needed. Do not swallow whole. Famotidine can be taken with or without food. To prevent heartburn and acid indigestion, take famotidine minutes before eating food or drinking beverages that can cause indigestion. Do not take more than 2 tablets in 24 hours unless directed by your doctor.
Follow all directions on the product package. If you have any questions, ask your doctor or pharmacist. Stop taking this medication and call your doctor promptly if your symptoms continue after you begin taking it, or if they do not improve after you have been taking this medication for 14 days in a row. Do not take this medication for more than 14 days in a row without talking with your doctor. Headache, constipation or diarrhea may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
If your doctor has directed you to use this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. A very serious allergic reaction to this drug is rare. This is not a complete list of possible side effects.
Over-the-counter famotidine comes as a tablet, a chewable tablet, and a capsule to take by mouth. It is usually taken once or twice a day. To prevent symptoms, it is taken 15 to 60 minutes before eating foods or drinking drinks that may cause heartburn. Follow the directions on your prescription or the package label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take famotidine exactly as directed.
Do not take more or less of it or take it more often or for a longer time than prescribed by your doctor. Thoroughly chew the chewable tablets before swallowing them. Swallow the chewed tablet with a full glass of water.
Do not take more than two tablets, capsules, or chewable tablets of over-the-counter famotidine in 24 hours and do not take over-the-counter famotidine for longer than 2 weeks unless your doctor tells you that you should. If symptoms of heartburn, acid indigestion, or sour stomach last longer than 2 weeks, stop taking over-the-counter famotidine and call your doctor. This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
If you forget a dose of prescription famotidine, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule.
Do not take a double dose to make up for a missed one. Over-the-counter famotidine is usually taken as needed. If your doctor has told you to take over-the-counter famotidine regularly, take the missed dose as soon as you remember it. Famotidine may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture not in the bathroom. Do not allow the liquid to freeze. Dispose of unused famotidine liquid after 30 days. Unneeded medications should be disposed of in special ways to ensure that pets, children, and other people cannot consume them.
However, you should not flush this medication down the toilet. Instead, the best way to dispose of your medication is through a medicine take-back program.
It is important to keep all medication out of sight and reach of children as many containers such as weekly pill minders and those for eye drops, creams, patches, and inhalers are not child-resistant and young children can open them easily. To protect young children from poisoning, always lock safety caps and immediately place the medication in a safe location — one that is up and away and out of their sight and reach.
In case of overdose, call the poison control helpline at If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at Do not let anyone else take your medicine. Ask your pharmacist any questions you have about refilling your prescription. It is important for you to keep a written list of all of the prescription and nonprescription over-the-counter medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements.
You should bring this list with you each time you visit a doctor or if you are admitted to a hospital.
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