The true statement among the options provided is:
Legally prescribed drugs such as painkillers can be abused and can lead to addiction.
This statement accurately reflects the potential risks associated with the misuse of legally prescribed pain medications, which can indeed lead to addiction and other serious health consequences.
The other statements are incorrect or misleading:
- Common medications like cough medicine can be dangerous at high doses, particularly those containing ingredients like dextromethorphan.
- Marijuana is often taken as an edible, in addition to being smoked or taken in synthetic forms.
- Stimulants like Adderall and Ritalin can be dangerous if taken at high doses, leading to serious health risks including cardiovascular problems and potential for addiction.