Combination drugs are used :-
1. Where an anti-inflammatory is necessary to counteract the toxic effects
of bacterial toxins whilst the anti-bacterial is acting alongside.
and
2. For prophylactic use after ophthalmic surgery, to suppress inflammation
and to reduce the risk of subsequent post-operative infection.
N.B.
Prolonged use of steroids requires tapering the dosage, and a check on IOP,
corneal thinning and cataract formation.