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Rifadin Side Effects Center
Medical Editor: John P. Cunha, DO, FACOEP
Rifater (rifampin, isoniazid and pyrazinamide) is used to treat or prevent tuberculosis (TB). It may also be used to eliminate a bacteria from your nose and throat that may cause meningitis or other infections, even if you do not have an infection. It is an antibiotic. Common side effects include upset stomach, heartburn, nausea, menstrual changes, headache, drowsiness, or dizziness. It may also produce a harmless, reddish coloration of urine, sweat, saliva, or tears. Soft contact lenses may be permanently stained.
To treat tuberculosis, the adult dose of Rifater is 10 mg/kg, in a single daily administration, not to exceed 600 mg/day, oral or IV. The pediatric dose 10-20 mg/kg, not to exceed 600 mg/day, oral or IV. Rifater may interact with acetaminophen, blood thinners, barbiturates, diazepam or similar medicines, beta-blockers, clofibrate, steroids, birth control pills or estrogen hormone replacement, heart medicines, HIV medicines, ketoconazole, itraconazole, fluconazole, methadone, phenytoin, ethotoin, mephenytoin, sulfa drugs, oral diabetes medication, cyclosporine, or theophylline. Rifater can interact with many drugs. Tell your doctor all medications you use. During pregnancy, Rifater should be used only prescribed. When this drug is taken during the last few weeks of pregnancy, the risk of bleeding in both mother and infant may be increased. Tell your doctor if you notice bleeding in your newborn. This medication passes into breast milk. Consult your doctor before breast-feeding.
Our Rifater (rifampin, isoniazid and pyrazinamide) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is Patient Information in Detail?
Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.
Rifadin in Detail - Patient Information: Side Effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
- fever, chills, body aches, flu symptoms;
- joint pain or swelling;
- easy bruising or bleeding, weakness;
- urinating less than usual or not at all; or
- nausea, stomach pain, loss of appetite, itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).
Less serious side effects may include:
- tired feeling; or
- red or orange colored urine, stools, tears, sweat, or saliva.
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
Read the entire detailed patient monograph for Rifadin (Rifampin) »
What is Patient Information Overview?
A concise overview of the drug for the patient or caregiver from First DataBank.
Rifadin Overview - Patient Information: Side Effects
This medication may produce a harmless, reddish coloration of urine, sweat, saliva, or tears. Soft contact lenses may be permanently stained.
Remember that your doctor has prescribed this medication because 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.
Rifampin may infrequently cause serious liver disease. Though sometimes necessary to completely treat certain infections, combination treatment with other drugs (e.g., isoniazid, pyrazinamide) may increase this risk. Tell your doctor immediately if any of these unlikely but serious side effects occur: flu-like symptoms (fever, chills, headache, muscle aches), change in amount of urine, persistent nausea/vomiting, stomach/abdominal pain, dark urine, yellowing eyes/skin, mental/mood changes (e.g., confusion, unusual behavior), unusual tiredness, easy bruising/bleeding, small red spots on the skin, joint pain/swelling.
This medication may rarely cause a severe intestinal condition (Clostridium difficile-associated diarrhea) due to a type of resistant bacteria. This condition may occur during treatment or weeks to months after treatment has stopped. Do not use anti-diarrhea products or narcotic pain medications if you have any of the following symptoms because these products may make them worse. Tell your doctor immediately if you develop: persistent diarrhea, abdominal or stomach pain/cramping, blood/mucus in your stool.
Use of this medication for prolonged or repeated periods may result in oral thrush or a new yeast infection (oral/vaginal fungal infection). Contact your doctor if you notice white patches in your mouth, a change in vaginal discharge, or other new symptoms.
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 (especially of the face/tongue/throat), severe dizziness, trouble 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 US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Read the entire patient information overview for Rifadin (Rifampin)»
What is Prescribing information?
The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.
Rifadin FDA Prescribing Information: Side Effects
Heartburn, epigastric distress, anorexia, nausea, vomiting, jaundice, flatulence, cramps, and diarrhea have been noted in some patients. Although Clostridium difficile has been shown in vitro to be sensitive to rifampin, pseudomembranous colitis has been reported with the use of rifampin (and other broad spectrum antibiotics). Therefore, it is important to consider this diagnosis in patients who develop diarrhea in association with antibiotic use.
Transient abnormalities in liver function tests (e.g., elevations in serum bilirubin, alkaline phosphatase, serum transaminases) have been observed. Rarely, hepatitis or a shock-like syndrome with hepatic involvement and abnormal liver function tests has been reported.
Thrombocytopenia has occurred primarily with high dose intermittent therapy, but has also been noted after resumption of interrupted treatment. It rarely occurs during well supervised daily therapy. This effect is reversible if the drug is discontinued as soon as purpura occurs. Cerebral hemorrhage and fatalities have been reported when rifampin administration has been continued or resumed after the appearance of purpura.
Rare reports of disseminated intravascular coagulation have been observed.
Agranulocytosis has been reported very rarely.
Central Nervous System
Headache, fever, drowsiness, fatigue, ataxia, dizziness, inability to concentrate, mental confusion, behavioral changes, muscular weakness, pains in extremities, and generalized numbness have been observed.
Psychoses have been rarely reported.
Rare reports of myopathy have also been observed.
Visual disturbances have been observed.
Menstrual disturbances have been observed.
Rare reports of adrenal insufficiency in patients with compromised adrenal function have been observed.
Elevations in BUN and serum uric acid have been reported. Rarely, hemolysis, hemoglobinuria, hematuria, interstitial nephritis, acute tubular necrosis, renal insufficiency, and acute renal failure have been noted. These are generally considered to be hypersensitivity reactions. They usually occur during intermittent therapy or when treatment is resumed following intentional or accidental interruption of a daily dosage regimen, and are reversible when rifampin is discontinued and appropriate therapy instituted.
Cutaneous reactions are mild and self-limiting and do not appear to be hypersensitivity reactions. Typically, they consist of flushing and itching with or without a rash. More serious cutaneous reactions which may be due to hypersensitivity occur but are uncommon.
Occasionally, pruritus, urticaria, rash, pemphigoid reaction, erythema multiforme including Stevens-Johnson Syndrome, toxic epidermal necrolysis, vasculitis, eosinophilia, sore mouth, sore tongue, and conjunctivitis have been observed.
Anaphylaxis has been reported rarely.
Edema of the face and extremities have been reported. Other reactions which have occurred with intermittent dosage regimens include &lduqo;flu syndrome&rduqo; (such as episodes of fever, chills, headache, dizziness, and bone pain), shortness of breath, wheezing, decrease in blood pressure and shock. The &lduqo;flu syndrome&rduqo; may also appear if rifampin is taken irregularly by the patient or if daily administration is resumed after a drug free interval.
Read the entire FDA prescribing information for Rifadin (Rifampin) »
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