P1E1

P1E1, P2E1, P3E1, P4E1, P6E1

trademarks for fixed-combination ophthalmic drugs containing a cholinergic (pilocarpine hydrochloride) and an adrenergic (epinephrine bitartrate). The numbers indicate the percentage of each ingredient in the solution; for example, P2E1 contains 2% pilocarpine hydrochloride and 1% epinephrine bitartrate.