Drug Interaction Report
2 potential interactions and/or warnings found for the following 2 drugs:
- meloxicam / rizatriptan
- prazosin
Interactions between your drugs
prazosin meloxicam
Applies to: prazosin, meloxicam / rizatriptan
MONITOR: Nonsteroidal anti-inflammatory drugs (NSAIDs) may decrease the antihypertensive effect of prazosin. The proposed mechanism is NSAID-induced inhibition of prostaglandin synthesis. Data are available for indomethacin. A similar interaction is expected with other NSAIDs.
MANAGEMENT: The patient's blood pressure should be monitored during coadministration, and the dosage adjusted as necessary.
References (2)
- Rubin P, Jackson G, Blaschke T (1980) "Studies on the clinical pharmacology of prazosin. II: The influence of indomethacin and of propranolol on the action and disposition of prazosin." Br J Clin Pharmacol, 10, p. 33-9
- Radack KL, Deck CC, Bloomfield SS (1987) "Ibuprofen interferes with the efficacy of antihypertensive drugs: a randomized, double-blind, placebo-controlled trial of ibuprofen compared with acetaminophen." Ann Intern Med, 107, p. 628-35
Drug and food interactions
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)
- 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
- (2002) "Product Information. Xatral (alfuzosin)." Sanofi-Synthelabo Canada Inc
Therapeutic duplication warnings
No duplication 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.
Drug Interaction Classification
| Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
| Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
| 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. | |
| No interaction information available. |
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