Prince Edward Island has updated its guidelines to include the recommendation of doxycycline post-exposure prophylaxis — better known as Doxy-PEP — to help prevent sexually transmitted infections.

Scott Alan, HIV and sexual health specialist with PEERS Alliance, described Doxy-PEP as "a bacterial infection prevention drug" that has been studied for about a decade.

Alan explained that Doxy-PEP can cut the risk of syphilis infection by up to three-quarters. For chlamydia, the rate jumps to about tw…