To je ludost riskirati jer nije 100% zaštita, sifilis samo 70-80%, klamidija 70-90%, a gonorea samo 50% i to treba uzeti u roku od 72 sata, u suprotnom pucanj u prazno. Ko će ić u doktora se svako malo sramotit za antibiotike, naročito za vikend kad ne rade. Doksicilin rješava djelomično samo bakterijske infekcije, virusne ništa. Savjetovat ovaj ruski rulet ne dolazi u obzir. Ipak treba mirno spavat:
Clinical trials of Doxy-PEP have shown significant reductions in syphilis (by 70–80%) and chlamydia (by 70–90%). Meanwhile, it was less effective in preventing gonorrhoea, proving ineffective in some trials or with only a 50–55% reduction in other trials. This is believed to be caused by varying levels of antibiotic-resistant gonorrhoea amongst the trial participants.