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Labetalol and Silenor

Determining the interaction of Labetalol and Silenor and the possibility of their joint administration.

Check result:
Labetalol <> Silenor
Relevance: 22.07.2023 Reviewer: Shkutko P.M., M.D., in

In the database of official manuals used in the service creation an interaction registered by statistical results of studies was found, which can either lead to negative consequences for the patient health or strengthen a mutual positive effect. A doctor should be consulted to address the issue of joint drug administration.

Consumer:

Labetalol may increase the blood levels of doxepin. You may need dose adjustments or monitoring in order to safely take both medications together. You should notify your doctor if you have symptoms such as: tremor, low blood pressure, dry mouth, blurry vision, irregular or fast heartbeat, constipation, urinary retention or dizziness. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using your medications without first talking to your doctor first.

Professional:

MONITOR: Limited data suggest that labetalol can increase the plasma concentrations of tricyclic antidepressants. The proposed mechanism is competition for the same metabolic pathway. In a study (n=13), imipramine AUC increased by 53% in subjects taking labetalol compared to placebo. The manufacturers of labetalol indicate that concomitant use with tricyclic antidepressants may increase the incidence of tremors and hypotensive events. Carvedilol may also interact similarly.

MANAGEMENT: Close monitoring for clinical response and tolerance is recommended whenever labetalol is added to or discontinued from an antidepressant regimen. Patients should be advised to notify their physician if they experience excessive antidepressant effects such as tremor, dry mouth, blurry vision, irregular or fast heartbeat, constipation, urinary retention, dizziness, or hypotension. Dose adjustments may be necessary.

References
  • Agencia EspaƱola de Medicamentos y Productos Sanitarios Healthcare "Centro de informaciĆ³n online de medicamentos de la AEMPS - CIMA. Available from: URL: https://cima.aemps.es/cima/publico/home.html." ([2018]):
  • "Product Information. Trandate (labetalol)." Glaxo Wellcome, Research Triangle Park, NC.
  • "Product Information. Labetalol Hydrochloride (labetalol)." Watson Pharmaceuticals, Parsippany, NJ.
  • Hermann DJ, Krol TF, Dukes GE, et al "Comparison of verapamil, diltiazem, and labetalol on the bioavailability and metabolism of imipramine." J Clin Pharmacol 32 (1992): 176-83
  • Cerner Multum, Inc. "Australian Product Information." O 0
  • Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
Labetalol

Generic Name: labetalol

Brand name: Trandate, Normodyne

Synonyms: n.a.

Silenor

Generic Name: doxepin

Brand name: Silenor, Sinequan, Sinequan

Synonyms: n.a.

In the course of checking the drug compatibility and interactions, data from the following reference sources was used: Drugs.com, Rxlist.com, Webmd.com, Medscape.com.

Interaction with food and lifestyle
Disease interaction