Famotidine Davis (PDF-Online Reading-Download-Uses-Side Effects-Precautions)


Famotidine is used to treat ulcers in the stomach and intestines and to prevent intestinal ulcers from coming back after they have healed. This medication is also used to treat certain stomach and throat (esophagus) problems (such as erosive esophagitis, gastroesophageal reflux disease-GERD, Zollinger-Ellison syndrome). It works by decreasing the amount of acid your stomach produces. Relieves symptoms such as a persistent cough, stomach pain, heartburn, and difficulty swallowing. Famotidine belongs to a class of drugs known as H2 blockers.

This medicine is also available without a prescription. It is used to prevent and treat heartburn and other symptoms caused by too much acid in the stomach (acid indigestion). If you are taking this medication for self-treatment, it is important to read the manufacturer's package directions carefully so you know when to consult your doctor or pharmacist.

How to use Famotidine

Take this medication by mouth with or without food as directed by your doctor, usually once or twice a day. If you take this medicine once a day, it is usually taken just before bedtime.

The dose and duration of treatment depend on your medical condition and response to treatment. In children, the dose may also be based on body weight. You can take other medications (for example, antacids) for your condition as recommended by your doctor. Carefully follow your doctor's instructions. Consult your doctor or pharmacist if you have any questions.

Take this medicine regularly to get the most benefit from it. To help you remember, take it at the same time every day. Do not increase your dose or take it more often than prescribed. Do not stop taking this medicine without your doctor's approval because this may delay ulcer healing.

If you are using over-the-counter famotidine for the self-treatment of acid indigestion or heartburn, take 1 tablet by mouth with a glass of water as needed. To prevent heartburn, take 1 tablet by mouth with a glass of water 15 to 60 minutes before eating foods or beverages that cause heartburn. Do not use more than 2 tablets in 24 hours unless directed by your doctor. Do not take it for more than 14 days in a row without checking with your doctor.

Tell your doctor if your condition does not improve or if it worsens.

Side effects

It can cause headaches, constipation, or diarrhea. If any of these effects persist or get worse, tell your doctor or pharmacist immediately.

If your doctor has directed you to use this medicine, remember that your doctor has determined that the benefit to you is greater than the risk of side effects. Many people using this medicine do not have serious side effects.

Tell your doctor right away if you have any serious side effects, including easy bruising/bleeding, signs of infection (such as a sore throat that does not go away, fever, chills), mental / mood changes (such as restlessness, confusion, depression, hallucinations).

Get medical help right away if you have very serious side effects, such as fast/slow/irregular heartbeat, severe dizziness, fainting, seizures.

It is rare for a very serious allergic reaction to this drug. However, seek medical attention immediately if you notice any symptoms of a serious allergic reaction, such as rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, difficulty breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the USA -

Call your doctor for medical advice on side effects. You can report side effects to the FDA at 1-800-FDA-1088 or at http://www.fda.gov/medwatch.

In Canada: Call your doctor for medical advice on side effects. You can report side effects to Health Canada at 1-866-234-2345.


Before taking famotidine, tell your doctor or pharmacist if you are allergic to it; or to other H2 blockers (such as cimetidine, ranitidine); or if you have other allergies. This product may contain inactive ingredients that can cause allergic reactions or other problems. Consult your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: immune system problems, kidney problems, liver problems, lung problems (such as asthma, chronic obstructive pulmonary disease-COPD), other stomach problems (for example, tumors).

In fact, some symptoms may be signs of a more serious condition. Seek medical attention immediately if you have: heartburn with light-headedness/sweating/dizziness, chest/jaw/arm/shoulder pain (especially shortness of breath, unusual sweating), unexplained weight loss.

Also, before self-treating with this medication, seek medical attention immediately if you develop any of these signs of a serious condition: difficulty/pain swallowing food, vomiting blood, vomit that looks like coffee grounds, bloody/black stools, heartburn for more than 3 months, frequent chest pain, frequent wheezing (especially with heartburn), nausea/vomiting, stomach pain.

Do not use to treat children under 12 years of age unless directed by a doctor.

Older adults may be more sensitive to the side effects of this drug, especially mental / mood changes (such as confusion), seizures, or unusual tiredness.

Famotidine should be used

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