Rifampin

Rifampinis a prescription medication used for treatment of both tuberculosis and the meningococcal carrier state. Bacteriologic cultures should be obtained before the start of therapy to confirm the susceptibility of the organism to rifampin and they should be repeated throughout therapy to monitor the response to treatment.

• Rifampin is available under the following different brand names:RifadinandRimactane.

Dosage of Rifampin:

Adult and Pediatric Dosages:

Capsules

• 150 mg
• 300 mg

Injectable Powder

• 600 mg

Dosage Considerations – Should be Given as Follows:

Tuberculosis

Adult Dosage:

• 10 mg/kg/day orally or 10 mg/kg orally twice-weekly (directly observed therapy [DOT]); not to exceed 600 mg/day

Dosing considerations:

• It may be given in conjunction withisoniazidor with isoniazid or with isoniazid andpyrazinamide
• Rifampin dosage not to exceed 600 mg/day

Pediatric Dosage:

• 10-20 mg/kg/day intravenously/orally or 10-20 mg/kg orally twice-weekly (DOT); not to exceed 600 mg/day

Neisseria meningitidisCarrier

Adult Dosage

• 600 mg every 12 hours for 2 days

Pediatric Dosage

Prophylaxis

• Infants 1 month and younger: 10 mg/kg/day orally divided every 12 hours for 2 days
• Infants older than 1 month: 20 mg/kg/day orally divided every 12 hours for 2 days, not to exceed 600 mg/day

Haemophilus Influenzae Type BInfection

Adult Dosage

Prophylaxis

• 600 mg/day orally/intravenously for 4 days

Pediatric Dosage

Prophylaxis

• Infants 1 month and younger: 10 mg/kg/day orally for 4 days; not to exceed 600 mg/day

Side effects of rifampin include:

• heartburn
• abdominal pain
• loss of appetite
• nausea
• vomiting
• yellowing skin and eyes (jaundice)
• gas (flatulence)
• cramps
• diarrhea
• elevated liver function test (LFT) results
• hepatitis
• deficiency of platelets in the blood
• discoloration of the skin
• brain bleed
• fatalities
• abnormal clotting of the blood
• destruction of红细胞
• low red blood cell count
• headache
• fever
• drowsiness
• fatigue
• loss of full control of body movements
• dizziness
• inability to concentrate
• mental confusion
• behavioral changes
• muscularweakness
• pain in extremities
• generalized numbness
• visual disturbances
• menstrual disturbances
• elevatedBUN
• elevated serumuric acid
• flushing
• itching
• rash
• severe itching
• hives
• acute formation of blisters
• erythema multiforme, includingStevens-Johnson Syndrome
• toxicepidermalnecrolysis
• inflammation in blood vessels
• eosinophilia
• soremouth
• sore tongue
• pink eye
• acute allergic reaction (anaphylaxis)
• swelling
• 流感综合征
• shortness of breath
• wheezing
• decrease in blood pressure
• shock

Rare side effects of rifampin include:

• blood in urine
• inflammation in the kidney
• lack of blood flow to the kidneys
• kidney insufficiency
• acute kidney failure
• psychoses
• the disease of muscle tissue
• adrenal insufficiency, Addison's Disease
• loweredwhite blood cell count

This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.

If your doctor has directed you to use this medication, your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor, health care provider, or pharmacist first.

• Rifampin has severe interactions with at least 33 different drugs.
• Rifampin has serious interactions with at least 159 different drugs.
• 利福平与至少2温和的交互37 different drugs.
• Rifampin has mild interactions with at least 67 different drugs.

This information does not contain all possible interactions or adverse effects. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share this information with your doctor and pharmacist. Check with your health care professional or doctor for additional medical advice, or if you have health questions, concerns, or for more information about this medicine.

Warnings

This medication contains rifampin. Do not take Rifadin or Rimactane if you are allergic to rifampin or any ingredients contained in this drug.

Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center immediately

Contraindications

• Hypersensitivity to rifamycins
• Concomitant administration of live bacterialvaccines
• Contraindicated in patients receiving ritonavir-boosted saquinavir, because of increased risk of severe hepatocellular toxicity
• Contraindicated in patients receiving atazanavir, darunavir, fosamprenavir, saquinavir, or tipranavir, because rifampin may cause substantial decreases in plasma concentrations of theseantiviraldrugs, which may result in loss of antiviral efficacy or development of viral resistance

Effects of Drug Abuse

• No information available

Short-Term Effects

• See "What Are Side Effects Associated with Using Rifampin?"

Long-Term Effects

• Prolonged use may result in bacterial or fungal superinfection
• See "What Are Side Effects Associated with Using Rifampin?"

Cautions

• May decrease the effectiveness of oral contraceptive pills (OCPs)
• Do not administerparenteralpreparation intramuscularly or subcutaneously
• Patients on regimens of over 600 mg once or twice weekly may experience adverse reactions, including flulike syndrome
• History of diabetes mellitus (rifampin may make diabetes management more difficult)
• Regimens of over 600 mg once or twice weekly may causeleukemia,anemia, or thrombocytopenia
• Discontinue therapy if a patient develops any signs of hepatocellular damage, includinghyperbilirubinemia
• Prolonged use may result in bacterial or fungal superinfection
• Use with caution in patients with liver impairment and porphyria
• Not for use in meningococcal disease; may be suitable for short-term use inasymptomaticcarriers
• Use with caution in patients with a history ofalcoholismand patients receiving additional medications that may cause hepatotoxicity
• Rifampin is not recommended for intermittent therapy; caution patient against intentional or accidental interruption of daily dosage regimen; rare renal hypersensitivity reactions have been reported when therapy was resumed in such cases
• Rifampin has enzyme-inducing properties that can enhance themetabolismofendogenoussubstrates, including adrenal hormones,thyroid hormones, andvitamin D

Pregnancy and Lactation

• Use rifampin during pregnancy with caution if benefits outweigh risks
• Animal studies show risk and human studies are not available, or neither animal nor human studies were done
• Effects of rifampin during pregnancy are unknown
• It is reported to cross the placental barrier and appear incordblood; increasedcongenitalmalformations, primarily spina bifida andcleft palatereported in offspring of rodents given oral doses of 150-250 mg/kg/day during pregnancy; case reports of postnatalhemorrhagein mother and infant when administered during last few weeks of pregnancy
• Rifampin enters breast milk; consult with your physician if breastfeeding