Brand name:
Cimetidine - (Tagamet, Apo-Cimetidine)
Pronounced: TAG-ah-met
Generic name: Cimetidine
Other brand name: Cimetidine HB
Why is Cimetidine prescribed?

Cimetidine is prescribed for the treatment of certain kinds of stomach and intestinal ulcers and related conditions. These include: active duodenal (upper intestinal) ulcers; active benign stomach ulcers; erosive gastroesophageal reflux disease (backflow of acid stomach contents); prevention of upper abdominal bleeding in those who are critically ill; and excess-acid conditions such as Zollinger-Ellison syndrome (a form of peptic ulcer with too much acid). It is also used for maintenance therapy of duodenal ulcer following the healing of active ulcers. Cimetidine is known as a histamine blocker.

Some doctors also use Cimetidine to treat acne and to prevent stress-induced ulcers. It may also be used to treat chronic hives, herpesvirus infections (including shingles), abnormal hair growth in women, and overactivity of the parathyroid gland.

Cimetidine HB is an over-the-counter version of the drug used to relieve heartburn, acid indigestion, and sour stomach.
Most important fact about Cimetidine

Short-term treatment with Cimetidine can result in complete healing of a duodenal ulcer. However, there can be a recurrence of the ulcer after Cimetidine has been discontinued. The rate of ulcer recurrence may be slightly higher in people healed with Cimetidine rather than other forms of therapy. However, Cimetidine is usually prescribed for more severe cases.
How should you take Cimetidine?

You can take Cimetidine with or between meals. Do not take antacids within 1 to 2 hours of a dose of Cimetidine. Avoid excessive amounts of caffeine while taking Cimetidine.

It may take several days for Cimetidine to begin relieving stomach pain. Be sure to continue taking the drug exactly as prescribed even if it seems to have no effect.

Do not take the maximum daily dose of Cimetidine HB for more than 2 weeks continuously without consulting your doctor.

If you miss a dose Cimetidine (Tagamet, Apo-Cimetidine)

Take it as soon as you remember. If it is almost time for your next dose, skip the one you missed and go back to your regular schedule. Do not take 2 doses at once.

Cimetidine (Tagamet, Apo-Cimetidine) Storage instructions...

Store at room temperature in a tightly closed container, away from light.
Cimetidine (Tagamet, Apo-Cimetidine) side effects

Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Cimetidine.

* Side effects may include:
Breast development in men, headache

Less common side effects--agitation, anxiety, confusion, depression, disorientation, and hallucinations--may appear in severely ill individuals who have been treated for 1 month or longer. However, these reactions are not permanent and have cleared up within 3 to 4 days of discontinuation of the drug.
Why should Cimetidine not be prescribed?

If you have ever had an allergic reaction to Cimetidine, do not take Cimetidine.
Special warnings about Cimetidine

Ulcers may be more difficult to heal if you smoke cigarettes.

If you are being treated for a liver or kidney disorder, make sure the doctor is aware if it.

If you are over 50 years old, have liver or kidney disease, or are severely ill, you may experience temporary mental confusion while taking Cimetidine. Notify your doctor.

If you have trouble swallowing or persistent abdominal pain, do not take Cimetidine HB; instead, check with your doctor. You may have a serious condition that requires different treatment.
Possible food and drug interactions when taking Cimetidine

If Cimetidine is taken with certain other drugs, the effects of either can be increased, decreased, or altered. It is especially important that you check with your doctor before combining Cimetidine with the following:

Antidiabetic drugs such as Micronase and Glucotrol
Antifungal drugs such as Diflucan and Nizoral
Aspirin
Augmentin
Benzodiazepine tranquilizers such as Valium and Librium
Beta-blocking blood pressure drugs such as Inderal and Lopressor
Calcium-blocking blood pressure drugs such as Cardizem, Calan, and Procardia
Chlorpromazine (Thorazine)
Cisapride (Propulsid)
Cyclosporine (Sandimmune)
Digoxin (Lanoxin)
Medications for irregular heartbeat, such as Cordarone, Tonocard, Quinidex, and Procan
Metoclopramide (Reglan)
Metronidazole (Flagyl)
Narcotic pain relievers such as Demerol and Morphine
Nicotine (Nicoderm, Nicorette)
Paroxetine (Paxil)
Pentoxifylline (Trental)
Phenytoin (Dilantin)
Quinine
Sucralfate (Carafate)
Theophylline (Theo-Dur, others)
Warfarin (Coumadin)

Avoid alcoholic beverages while taking Cimetidine. This medication increases the effects of alcohol.

Antacids can reduce the effect of Cimetidine when taken at the same time. If you take an antacid to relieve the pain of an ulcer, the doses should be separated by 1 to 2 hours.

If you need to take an antifungal drug such as Nizoral, you should take it at least 2 hours before you take Cimetidine.
Special information if you are pregnant or breastfeeding

The effects of Cimetidine during pregnancy have not been adequately studied. If you are pregnant or plan to become pregnant, notify your doctor immediately. Cimetidine appears in breast milk and could affect a nursing infant. If Cimetidine is essential to your health, your doctor may advise you to discontinue breastfeeding until treatment with Cimetidine is finished.
Recommended dosage for Cimetidine

Cimetidine (ADULTS)
Overdosage

Information concerning overdosage is limited. However, respiratory failure, an increased heartbeat, exaggerated side effect symptoms or reactions such as unresponsiveness may be signs of Cimetidine overdose. If you experience any of these symptoms, notify your doctor immediately.