Company Nurse need Advise

Hi, Im a newly hired Company Nurse in a Hotel. I will be handling 400 Staffs. NO co-nurses and MD. I'd just want to check what are the Drugs I should keep on the Medicine Cabinet were I can prescribe without doctors order (OTC) - the safe drugs only, maybe for frist aide or for pain reliever.

I dont have idea as the Hotel is newly opened only and they do not have any information about the Clinic. I will be the one to provide Medical Equipment inside the Clinic. Still don't have idea which equipment i should buy. Please help me!! Need your urgent advise. THANK YOU