If you have had unsafe sex within the past 72 hours, you can go to a sexual health clinic or your nearest hospital's Accident and Emergency (A&E) department and ask for PEP. The doctor will go through an assessment to find out your level of risk before deciding whether to prescribe PEP.

You can take our risk assessment first to find out your level of risk.

• This article was last reviewed on: 11/10/2011
• Date due for next review: 11/10/2013