Which drug is best in treating bodyache and headache?

NSAID: A non steroidal anti-inflammatory drug like Ibuprofen should be a good choice, tylenol (acetaminophen) would be second if allergic. Just follow the bottle's recommendation for dose. They are over the counter so you can find them in your local pharmacy or supermarket.

Depends: You will need to have a diagnosis first and find the cause of the headaches and body aches. Once this is determined you can discuss treatment options