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Drug Interactions between prazosin and pyrophosphate

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

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Interactions between your drugs

Moderate

prazosin pyrophosphate

Applies to: prazosin and pyrophosphate

MONITOR: Medicinal products including sodium heparin, prazosin, methyldopa, hydralazine, quinidine, beta blockers, calcium channel blockers, digitalis glycosides, nitrates, anthracyclines, and iodinated contrast agents may interfere with the blood pool images taken using Technetium Tc 99m pyrophosphate. This is characterized by a reduction in the amount of injected radioactivity remaining in the blood pool.

MANAGEMENT: Clinicians should be aware of the possibility of a diagnostic interference. When use of iodinated contrast media is anticipated, it is recommended to perform the scintigraphy with (99mTc)-labeled red blood cells prior to administration of the iodinated contrast media to avoid adversely affecting the red blood cell labeling.

References (2)
  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. (2012) "Product Information. Pyrophosphate (pyrophosphate)." Pharmalucence Inc

Drug and food interactions

Moderate

prazosin food

Applies to: prazosin

GENERALLY AVOID: The concurrent use of ethanol and alpha-1 adrenergic blockers may cause increased hypotensive effects. Patients with aldehyde dehydrogenase deficiencies (primarily Asians) may be at a higher risk of this interaction. The mechanism has not been determined. Data exist for prazosin and other alpha adrenergic blockers are expected to interact also. In addition, any patients taking alpha adrenergic blockers may experience excessive orthostatic hypotension with ethanol ingestion, due to ethanol's unopposed vasodilatory effects in the presence of alpha adrenergic blockade.

MANAGEMENT: Patients who develop a flushing reaction after ethanol ingestion (indicates a possible aldehyde dehydrogenase deficiency) should be advised to avoid ethanol or limit their intake. All patients should be warned about the possibility of orthostatic hypotension with concurrent ethanol use.

References (2)
  1. Kawano Y, Abe H, Kojima S, Takishita S, Omae T (2000) "Interaction of alcohol and an a1-blocker on ambulatory blood pressure in patients with essential hypertension." Am J Hypertens, 13, p. 307-12
  2. (2002) "Product Information. Xatral (alfuzosin)." Sanofi-Synthelabo Canada Inc

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.

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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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