Nah, there are drugs that already exist in the body (such as the extremely strong psychedelic DMT, which naturally occurs in tiny amounts within human brains an

Nah, there are drugs that already exist in the body (such as the extremely strong psychedelic DMT, which naturally occurs in tiny amounts within human brains and within many other animals and plants). There isn't a hard scientific boundary of what substances count as a "drug", and if a hormone is being taken as a pill to affect a human then it is being used as a drug.