Oxycontin is time released oxycodone.

Lortab, Vicodin, and Norco are generic names for Hydrocodone.
Acetaminaphen=Tylenol.
Norco has the least Tylenol per pill.

Percocet is codene.

Ms Contin = morphine.

All of the above are opiates.

You know each pill has a number and letter code.
There are websites that will tell you what pill you have.