Essays / My essay is on drugs - start and conclusion [3]

how do i do a conclusion for my essay i dont know where to start, i know i have to basically summarize what i have written. my essay is on drugs and my question and thesis for my essay are there is no such thing as a safe drug. "To what extent do you agree. This opinion is quite true there is no such thing as a safe drug but it is possible under expert supervision for drugs to be relatively.

for my body is

1. unsafe legal drugs- tobacco and alcohol
2. unsafe illegal drugs- heroin and cocaine
3. safe use of legal drugs- prescriptions
4. safe use of illegal drugs- marijuana