THATS WHAT IT LOOKS LIKE.
I have found 2 tablets with the imprint PP 100, hopefully one of them fits your pill.
Tramadol HCl SR 24HR Biphasic Release 100mg
Imprint Code PP 100
White round tablet
More info at https://www.drugs.com/tramadol.html
Imprint Code PP / 100
blue / pink capsule
More info at https://www.drugs.com/mtm/itraconazole.html
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