Free tool

PEP Time Checker

PEP is emergency medicine that must be started within 72 hours of a risk. Enter the date and time of the exposure to see whether you are still in time.

This tool provides general educational information only and is not a medical diagnosis. Whether PEP is right for you must be assessed by a clinician. If your risk was recent, contact a clinic now rather than waiting on this page.

Date & time of risk

Give the time as accurately as you can — the 72-hour window is counted in hours, not days.

Are you taking antiretroviral medicine?

No PEP or PrEP Already started PEP Currently on PrEP Not sure / recently stopped PrEP

If you are on PrEP, recently stopped, or have had a long-acting injectable, a clinic has to assess whether PEP is still needed.

Need PEP?

Find a clinic near you, or browse all services.

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Learn more

This tool provides general educational information only and is not a medical diagnosis. Risk assessment and any PEP prescription must come from a healthcare professional.