Based on your description, the closest match i'm finding is an oval white pill marked with p 525, manufactured by athlon pharma. Search by imprint, shape, color or drug name. Pill identifier results for 525.
This medicine is known as entex pse (generic name: Pill with imprint tylenol pm is blue, capsule/oblong and has been identified as tylenol pm extra strength acetaminophen 500 mg / diphenhydramine hydrochloride 25 mg. This white elliptical / oval pill with imprint p525 on it has been identified as:
This particular pill reportedly contains. Search by imprint, shape, color or drug name. Pill identifier results for 525 blue and capsule/oblong. Pill identifier results for p 25.
Acetaminophen/diphenhydramine acetaminophen 500 mg / diphenhydramine hydrochloride 25.