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Drug Interactions between Demadex and MHP-A

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

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Interactions between your drugs

Minor

phenyl salicylate torsemide

Applies to: MHP-A (hyoscyamine / methenamine / methylene blue / phenyl salicylate) and Demadex (torsemide)

Salicylates in anti-inflammatory dosages may blunt the diuretic and natriuretic response to loop diuretics. The interaction has been demonstrated in patients with ascites secondary to liver cirrhosis and in normal volunteers. Investigators theorize that salicylates may inhibit the renal effects of loop diuretics that are mediated by prostaglandins, including increases in sodium excretion, renal blood flow, and plasma renin activity. Since renal prostaglandins are believed to play a major role in the maintenance of renal blood flow and glomerular filtration rate in cirrhotics with ascites, the interaction may be particularly important in this population. No clinical interventions are generally required, but the possibility of a potential interaction should be considered in patients with ascites treated with a loop diuretic and salicylate or salicylate-related product.

References

  1. Kaufman J, Hamburger R, Matheson J, Flamenbaum W "Bumetanide-induced diuresis and natriuresis: effect of prostaglandin synthetase inhibition." J Clin Pharmacol 21 (1981): 663-7
  2. Salerno F, Lorenzano E, Maggi A, Badalamenti S, Minuz P, Degan M, Chinea B, Scotti A "Effects of imidazole-salicylate on renal function and the diuretic action of furosemide in cirrhotic patients with ascites." J Hepatol 19 (1993): 279-84
  3. Bartoli E, Arras S, Faedda R, Soggia G, Satta A, Olmeo NA "Blunting of furosemide diuresis by aspirin in man." J Clin Pharmacol 20 (1980): 452-8
  4. Tobert MB, Ostaszewski T, Reger B, Meisinger MA, Cook TJ "Diflunisal-furosemide interaction." Clin Pharmacol Ther 27 (1980): 289-90
  5. Planas R, Arroyo V, Rimola A, Perez-Ayuso RM, Rodes J "Acetylsalicylic acid suppresses the renal hemodynamic effect and reduces the diuretic action of furosemide in cirrhosis with ascites." Gastroenterology 84 (1983): 247-52
  6. Wilson TW, McCauley FA, Wells HD "Effects of low-dose aspirin on responsses to furosemide." J Clin Pharmacol 26 (1986): 100-5
  7. Valette H, Apoil E "Interaction between salicylate and two loop diuretics." Br J Clin Pharmacol 8 (1979): 592-4
View all 7 references

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Drug and food interactions

Moderate

hyoscyamine food

Applies to: MHP-A (hyoscyamine / methenamine / methylene blue / phenyl salicylate)

GENERALLY AVOID: Use of anticholinergic agents with alcohol may result in sufficient impairment of attention so as to render driving and operating machinery more hazardous. In addition, the potential for abuse may be increased with the combination. The mechanism of interaction is not established but may involve additive depressant effects on the central nervous system. No effect of oral propantheline or atropine on blood alcohol levels was observed in healthy volunteers when administered before ingestion of a standard ethanol load. However, one study found impairment of attention in subjects given atropine 0.5 mg or glycopyrrolate 1 mg in combination with alcohol.

MANAGEMENT: Alcohol should generally be avoided during therapy with anticholinergic agents. Patients should be counseled to avoid activities requiring mental alertness until they know how these agents affect them.

References

  1. Linnoila M "Drug effects on psychomotor skills related to driving: interaction of atropine, glycopyrrhonium and alcohol." Eur J Clin Pharmacol 6 (1973): 107-12

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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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