This is completely false. Legal Medications can come with many risks. For example, oxycodone, a painkiller, is very similar to heroin in the risk of addictiveness as well as abusability. The same being with amphetamines (adderall/dexedrine) to meth. Just because it is legal, does not mean it is any safer or more dangerous.
NONONONONONO!!! Almost every medication has a risk or side effect. If you watch TV and see those commercials for medications, there is a long blurb at the end about all of the things that may happen to you