531 MD pill
2 pills in our database have the imprint 531 MD. All of them are Methylphenidate Hydrochloride 5 mg.
They differ in strength and maker, so compare those with your pill and its package.
How to tell them apart
| Pill | Made by |
|---|---|
| Methylphenidate Hydrochloride | Ucb Pharma, Inc |
| Methylphenidate Hydrochloride 5 mg | Unither Manufacturing, LLC |