“…Although it has a sulphonamide moiety, this is not cross-reactive, so does not need to be avoided by people who are allergic to sulfonamide antibiotics such as sulfamethoxazole. 33,34 A 2016 phase III trial by Tanihara et al 12 examined the safety of ripasudil 0.4% when applied twice daily over a 52 week period and found the most frequent adverse drug reactions (ADRs) to be conjunctival hyperaemia (n = 264, 74.6%), blepharitis (n = 73, 20.6%), allergic conjunctivitis (n = 61, 17.2%), eye irritation (n = 36, 10.2%), conjunctivitis (n = 26, 7.3%) and eyelids pruritus (n = 16, 4.5%), where patients can have a combination of ADRs. This represented a high overall rate of ADRs at 85.0%, which reduced to 18.6% in the reporting of 12-month post-marketing surveillance (PMS).…”