Who should not take Acyclovir
A contraindication is a condition under which Acyclovir (Acyclovir) should not be taken because the risk outweighs the benefit. Acyclovir has both absolute contraindications (do not use) and relative cautions (use only after careful review). This page summarises both at the 200mg, 400mg, 800mg dosing range.
Absolute contraindications
According to the prescribing information for Acyclovir, absolute contraindications typically include severe allergic reactions to the active ingredient or excipients, severe hepatic or renal impairment, certain cardiovascular conditions, and concurrent use of specific interacting medications. The exact list depends on the molecule and is detailed in the official label.
Relative cautions
Relative cautions are situations where Acyclovir can be used but with extra monitoring, dose reduction or alternative considered. These often include mild-to-moderate organ impairment, age extremes, multiple comorbidities, and complex medication regimens. Acyclovir is a guanosine analogue selectively phosphorylated by viral thymidine kinase to its monophosphate form, then by cellular kinases to acyclovir triphosphate.
Frequently asked questions
Can someone with heart disease take Acyclovir? ▾
Some forms of heart disease are absolute contraindications for Acyclovir, particularly with nitrate use or recent cardiovascular events. Stable, well-controlled cardiovascular disease may allow Acyclovir use under specialist supervision. The prescribing information for Acyclovir should be reviewed.
Is Acyclovir safe with kidney problems? ▾
Mild to moderate kidney impairment usually allows Acyclovir at adjusted lower 200mg, 400mg, 800mg doses. Severe kidney failure is often a contraindication or requires substantial dose reduction. The prescriber decides based on lab results and concurrent medications.
More on Acyclovir
- With alcoholAcyclovir and alcohol — is it safe to drink?
- With foodShould Acyclovir be taken with food?
- Side effectsAcyclovir side effects: common, rare and warning signs
- Dosage guideAcyclovir dosage guide: how much to take and when
- OnsetHow fast does Acyclovir start working?
- DurationHow long does Acyclovir last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.