“…The most frequent STIs recorded were gonorrhoea (23 citations; prevalence reported in chemsex-related drug users was 3.9%â100% 12,14â17,20,22,26,29,32,56,77,78,80,82,84,86,87,92,98,103â105 ) and syphilis (16 citations; prevalence reported in chemsex users was 3.6%â100% 12,14â16,23,24,26,51,61,77,80,85,86,98,103,106 ). In a systematic review, Rajasingham et al 86 identified HIV-infected MSM who had used crystal methamphetamines in the prior 3 months to have a significantly higher chance of being diagnosed with an STI (gonorrhoea, chlamydia or syphilis) in the past year, compared to HIV-infected MSM who had not used crystal methamphetamine (OR = 3.37, 95% CI: 1.67â6.81).…”