This brown, round pill imprinted with AN 1 is a Phenazopyridine hydrochloride 100 MG Oral Tablet, per the NIH.
Phenazopyridine Hydrochloride is a human prescription drug. The active pharmaceutical ingredient is phenazopyridine hydrochloride.
This pill is made by a total of 6 firms: (1) Amneal Pharmaceuticals, (2) Rebel Distributors Corp, (3) American Health Packaging, (4) Unit Dose Services, (5) Cardinal Health, and (6) Lake Erie Medical DBA Quality Care Products LLC.
There are 5 other brown pills that with a similar imprint: "AN 1". They may be a different dosage of the same drug or a different drug entirely.