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Drug Interactions between fluphenazine and propylthiouracil

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Major

fluPHENAZine propylthiouracil

Applies to: fluphenazine and propylthiouracil

MONITOR CLOSELY: The concomitant use of fluphenazine and antithyroid agents may theoretically increase the risk of agranulocytosis. The mechanism of this interaction is unknown but may be related to synergistic effects as both drugs have been associated with agranulocytosis.

MANAGEMENT: If these drugs must be used together, close observation and testing for evidence of granulocytopenia is recommended. Patients should be advised to promptly report any symptoms such as tiredness, weakness, sore throat, fever, stomatitis, malaise, or flu-like symptoms.

References (1)
  1. Cerner Multum, Inc. "Australian Product Information."

Drug and food interactions

Moderate

fluPHENAZine food

Applies to: fluphenazine

GENERALLY AVOID: Concurrent use of ethanol and phenothiazines may result in additive CNS depression and psychomotor impairment. Also, ethanol may precipitate dystonic reactions in patients who are taking phenothiazines. The two drugs probably act on different sites in the brain, although the exact mechanism of the interaction is not known.

MANAGEMENT: Patients should be advised to avoid alcohol during phenothiazine therapy.

References (2)
  1. Lutz EG (1976) "Neuroleptic-induced akathisia and dystonia triggered by alcohol." JAMA, 236, p. 2422-3
  2. Freed E (1981) "Alcohol-triggered-neuroleptic-induced tremor, rigidity and dystonia." Med J Aust, 2, p. 44-5

Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

See also

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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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