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RIFAMPIN
RIFAMPIN - INJECTION

Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.

RIFAMPIN - INJECTION

(riff-AM-pin)

COMMON BRAND NAME(S): Rifadin

Uses

This medication is used in the treatment of tuberculosis or other infections when the oral form cannot be taken. Use of only rifampin and pyrazinamide as a two-drug, two-month therapy to treat tuberculosis (specifically "latent" TB infection) is no longer recommended. Infrequently, serious (sometimes fatal) liver disease has occurred with the use of these two drugs alone. Several other effective alternative treatments can be used to treat latent tuberculosis (e.g., isoniazid for 9 months). Use of rifampin and pyrazinamide as part of a multi-drug (3 or more drugs) treatment plan for tuberculosis is still acceptable. Consult your doctor or pharmacist for more details.

How To Use

This medication is given by injection into a vein usually once or twice a day. Avoid injecting intramuscularly or subcutaneously. Inject into a vein only. This medication must be used as prescribed. Do not skip doses or stop using this without your doctor's approval. Stopping therapy too soon may result in ineffective treatment. Full course of therapy may take several months or longer to complete.

Side Effects

Sore mouth, drowsiness, dizziness or flushing may occur the first several days as your body adjusts to the medication. If any of these effects continue or become bothersome, inform your doctor. Tell your doctor immediately if any of these unlikely but serious side effects occur: weakness, unusual bruising or bleeding, flu-like symptoms (fever, chills, headache, muscle ache), nausea, vomiting, stomach pain, dark urine, yellowing of the eyes or skin, pale stools, numbness or tingling of the hands or feet, changes in vision, confusion, memory trouble, sore throat. This medication may cause urine, saliva, tears, stools and sweat to turn red-orange in color. Do not be alarmed. This will disappear when the medication is stopped. Notify your doctor if the injection site becomes swollen or irritated. Another injection site may be necessary. In the unlikely event you have an allergic reaction to this drug, seek immediate medical attention. Symptoms of an allergic reaction include: rash, itching, swelling, dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.

Precautions

Tell your doctor if you have: liver disease, blood disorders, history of alcohol use, any allergies. Alcohol can reduce the effectiveness of this medication and increase side effects. Limit alcohol consumption while taking this medication. Use caution operating machinery or participating in activities requiring alertness if this medication makes you feel drowsy or dizzy. Soft contact lenses may be permanently discolored by this medication. This medication should be used only if clearly needed during pregnancy or while breast-feeding. Discuss the risks and benefits with your doctor.

Drug Interactions

This drug is not recommended for use with: delavirdine. Ask your doctor or pharmacist for more details. Inform your doctor about all the medicines you may use (both prescription and nonprescription), especially of: warfarin, oral medicines for diabetes, azole antifungals (e.g., itraconazole, ketoconazole), theophylline, halothane, verapamil, certain protease inhibitors (e.g., nelfinavir), live vaccines, corticosteroids (e.g., prednisone), disopyramide, beta-blockers (e.g., metoprolol), isoniazid, digitoxin, quinidine, mexiletine, phenytoin, cyclosporine, zidovudine. Rifampin can decrease the effectiveness of oral contraceptives. Discuss the use of other birth control methods with your doctor. Also report drugs which cause drowsiness such as sedatives, tranquilizers, psychiatric medicines, anti-seizure or anti-anxiety drugs, narcotic pain relievers and certain antihistamines (e.g., diphenhydramine). Do not start or stop any medicine without doctor or pharmacist approval.

Overdose

If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include swelling of face or around eyes, itching over the entire body, orange or red discoloration of skin or eyes, nausea, vomiting, drowsiness, and loss of consciousness.

Notes

Laboratory tests will be done frequently to monitor the effectiveness of this medication and to prevent side effects.

Missed Dose

Try to use each dose at the scheduled time. If you miss a dose, use it as soon as remembered; do not use it if it is near the time for the next dose, instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.

Storage

The undiluted vials of this medication may be stored at room temperature as directed. If diluted in 10 ml, use within 24 hours. If diluted in 100 ml or 500 ml use within 4 hours. Check the expiration date on the label and properly discard of any unused medication after that date.