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Pyrazinamide

Pyrazinamide

Why is this medication prescribed?

Pyrazinamide kills or stops the growth of certain bacteria that cause tuberculosis (TB). It is used with other drugs to treat tuberculosis.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

How should this medicine be used?

Pyrazinamide comes as a tablet to take by mouth. It usually is taken once a day (at the same time each day) or in larger doses twice a week. Pyrazinamide may be taken with or without food. Follow the directions on your prescription label carefully, and ask your pharmacist or doctor to explain any part you do not understand. Take pyrazinamide exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

What side effects can this medication cause?

Pyrazinamide may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

  • upset stomach
  • fatigue
  • If you experience any of the following symptoms, call your doctor immediately:
  • skin rash
  • fever
  • vomiting
  • loss of appetite
  • yellowing of the skin or eyes
  • darkened urine
  • pain and swelling in the joints
  • unusual bleeding or bruising
  • difficult urination

Uses

Pyrazinamide is used with other medications to treat tuberculosis (TB). It is an antibiotic and works by stopping the growth of bacteria.

This antibiotic treats only bacterial infections. It will not work for viral infections (such as common cold, flu). Using any antibiotic when it is not needed can cause it to not work for future infections.

WARNINGS:

Patients started on pyrazinamide should have baseline serum uric acid and liver function determinations. Those patients with preexisting liver disease or those at increased risk for drug related hepatitis (e.g., alcohol abusers) should be followed closely.

Pyrazinamide should be discontinued and not be resumed if signs of hepatocellular damage or hyperuricemia accompanied by an acute gouty arthritis appear.

PRECAUTIONS:

General:

Pyrazinamide inhibits renal excretion of urates, frequently resulting in hyperuricemia which is usually asymptomatic. If hyperuricemia is accompanied by acute gouty arthritis, pyrazinamide should be discontinued.

Pyrazinamide should be used with caution in patients with a history of diabetes mellitus, as management may be more difficult.

Primary resistance of M. tuberculosis to pyrazinamide is uncommon. In cases with known or suspected drug resistance, in vitro susceptibility tests with recent cultures of M. tuberculosis against pyrazinamide and the usual primary drugs should be performed. There are few reliable in vitro tests for pyrazinamide resistance.

OVERDOSAGE:

Overdosage experience is limited. In one case report of overdose, abnormal liver function tests developed. These spontaneously reverted to normal when the drug was stopped. Clinical monitoring and supportive therapy should be employed. Pyrazinamide is dialyzable.

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