on-demand dosing

On-demand dosing – a term for taking medicines only at times linked to a relevant event.

On-demand dosing for PrEP is also called “event based dosing” (EBD).

For example, on-demand dosing for PrEP (to prevent HIV transmission) involves taking PrEP before sex and then for several days after sex. EBD for PrEP is only appropriate in some situations and for some people – otherwise daily dosing is recommended,