Driving on Valtrex: is it safe?
Driving safely while taking Valtrex (Valacyclovir) depends on whether the medication causes drowsiness, dizziness, blurred vision or impaired reaction time at 500mg, 1000mg. For most adults, Valtrex is compatible with driving once a stable response is established, but the first dose and dose changes deserve extra caution.
Side effects that affect driving
Among the side effects of Valacyclovir, dizziness, sleepiness, blurred vision and slowed reactions are the ones most relevant for driving. Most users do not develop these at 500mg, 1000mg; those who do typically notice the effect within hours of dosing and during the first weeks of therapy.
Practical guidance
According to the prescribing information for Valacyclovir, until you know how you respond to Valtrex, you should avoid driving. After several doses with no relevant side effects, normal driving is usually safe. Valacyclovir is rapidly and almost completely converted to acyclovir during first-pass intestinal and hepatic metabolism by valacyclovir hydrolase. Combining Valtrex with alcohol or sedating medications adds risk and is not advised before driving.
Frequently asked questions
Can I drive after taking Valtrex? ▾
After several doses without dizziness, blurred vision or sedation, most users drive normally on Valtrex at 500mg, 1000mg. The first dose and any dose increase deserve a precautionary period without driving until tolerance is confirmed.
Is Valtrex legal to drive on? ▾
In most jurisdictions, prescribed Valtrex taken as directed is legal to drive on. Local drug-driving laws and the active ingredient Valacyclovir should be checked. Driving while impaired by any medication is illegal regardless of prescription status.
More on Valtrex
- With alcoholValtrex and alcohol — is it safe to drink?
- With foodShould Valtrex be taken with food?
- Side effectsValtrex side effects: common, rare and warning signs
- Dosage guideValtrex dosage guide: how much to take and when
- OnsetHow fast does Valtrex start working?
- DurationHow long does Valtrex last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.