Cequa comes in single-use vials instead of a larger multi-use bottle because the drug doesn’t contain any preservatives.
Preservatives help keep bacteria from growing in the bottle. If the bacteria enter your eye through an eye drop, they could cause an infection. Larger bottles that contain more than one dose normally have preservatives in them.
Because Cequa doesn’t contain any preservatives, it comes in a single-use vial. Be sure to discard your used Cequa vial after taking your dose. You shouldn’t reuse a Cequa vial, even if there’s some medication left in the vial. Bacteria could form in or on the vial after the first use.