Key BNF Warnings and Drug Interactions
Critical Medication Interactions
The BNF highlights several important drug interactions with aciclovir that require careful monitoring. Nephrotoxic medications including aminoglycosides (gentamicin, amikacin), ciclosporin, and tacrolimus may increase the risk of kidney problems when used alongside aciclovir. Healthcare providers should monitor kidney function regularly if these combinations are necessary.
Medications That Affect Aciclovir Levels
Probenecid, used for gout treatment, significantly increases aciclovir blood concentrations by reducing kidney elimination. This interaction may require dose adjustments under medical supervision. Mycophenolate mofetil, an immunosuppressant, may have enhanced effects when combined with aciclovir, particularly in transplant patients.
What Conditions Require Extra Caution
The BNF emphasises caution in patients with kidney impairment, as aciclovir elimination depends on kidney function. Dehydration increases the risk of kidney problems, particularly with high-dose treatment. Elderly patients require closer monitoring due to age-related kidney function decline. Neurological conditions may be worsened by high-dose intravenous aciclovir.
Safe Practices and Monitoring
Regular kidney function tests are recommended during extended aciclovir treatment. Maintaining adequate hydration helps prevent kidney complications. EverydayMeds stocks aciclovir tablets and cream formulations, with comprehensive patient information provided for safe use. Always inform prescribers about all medications, including over-the-counter products and supplements, before starting aciclovir therapy.
