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AccessPak for HIV PEP Expanded with Kaletra and Tolterodine Tartrate Capsules

Determining the interaction of AccessPak for HIV PEP Expanded with Kaletra and Tolterodine Tartrate Capsules and the possibility of their joint administration.

Check result:
AccessPak for HIV PEP Expanded with Kaletra <> Tolterodine Tartrate Capsules
Relevance: 08.06.2022 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:

Ritonavir may increase the blood levels and effects of tolterodine. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Contact your doctor if your condition changes or you experience increased side effects. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Professional:

ADJUST DOSE: Coadministration with drugs that are inhibitors of CYP450 3A4 may increase the plasma concentrations of tolterodine, which is partially metabolized by the isoenzyme. The possibility of prolonged and/or increased pharmacologic effects of tolterodine should be considered. Although tolterodine is primarily metabolized by CYP450 2D6, there is some evidence that CYP450 3A4 may play a minor role, thus any alteration in its activity levels could conceivably affect the metabolism of tolterodine. The clinical significance of this interaction is yet unknown but may be greater in patients who are CYP450 2D6-deficient, or so-called poor metabolizers of CYP450 2D6 (approximately 7% of Caucasians and less than 2% of Asians and individuals of African descent).

MANAGEMENT: The manufacturer recommends a maximum tolterodine dosage of 1 mg twice daily in patients receiving concomitant CYP450 3A4 inhibitors. Close clinical and laboratory monitoring is advised whenever a CYP450 3A4 inhibitor is added to or withdrawn from therapy. Patients should be advised to notify their physician if they experience an irregular heartbeat, severe blurry vision, difficulty urinating, dry mouth, headache, drowsiness, dizziness, or GI upset.

References
  • "Product Information. Detrol (tolterodine)." Pharmacia and Upjohn, Kalamazoo, MI.
  • Brynne N, Forslund C, Hallen B, Gustafsson LL, Bertilsson L "Ketoconazole inhibits the metabolism of tolterodine in subjects with deficient CYP2D6 activity." Br J Clin Pharmacol 48 (1999): 564-72
AccessPak for HIV PEP Expanded with Kaletra

Generic Name: emtricitabine / lopinavir / ritonavir / tenofovir

Brand name: AccessPak for HIV PEP Expanded with Kaletra

Synonyms: n.a.

Tolterodine Tartrate Capsules

Generic Name: tolterodine

Brand name: Detrol, Detrol LA

Synonyms: Tolterodine

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.