<unk> , sold under the brand name Naphcon-A among others, is a combination eye drop used to help the symptoms of allergic conjunctivitis such as from hay fever. It contains<unk>  and<unk> . It is used as an eye drop. Use is not recommended for more than three days. Side effects may include allergic reactions, eye pain, and dilated pupils. It is unclear if use in pregnancy is safe.<unk>  works by resulting in constriction of blood vessels thus decreasing redness while<unk>  works by blocking the effects of histamine to stop itching. The combination was approved for medical use in the United States in 1994. It is available over the counter. In 2017, it was the 203rd most commonly prescribed medication in the United States, with more than two million prescriptions.
Naphazoline/pheniramine
Phenylephrine/ketorolac
Diclofenac/misoprostol
Pseudoephedrine/loratadine
Sumatriptan/naproxen sodium
Hydrocortisone/oxytetracycline
Bupivacaine/meloxicam
Butalbital/acetaminophen