What is z on one side and 70 on the other side pill use for? plz tell me asap.i found this pill while cleaning my daughter room

Hard to guess: There are many, many pill makers throughout the world. There is a picture of a round pill with a Z on one side and a 70 on the other side, on the webpage: http://www.zydususa.com/all-products/#M That webpage says it is metformin 500mg, but one cannot be sure that some other pills in the world don't have the same markings.

Websites available: If you google "pill identifier" you can find several websites that will help you learn what it is. But think about it first: maybe you don't want to know, or maybe you shouldn't -- depending on your daughter's age and other factors.