Final answer:
The usual source of a drug for first-time users can be peer pressure, curiosity, or family members who are already using drugs.
Step-by-step explanation:
The usual source of a drug for the first-time user can vary depending on the drug in question. However, peer pressure is often a common source for first-time drug users. Peers may encourage or pressure someone to try a drug for the first time. This can happen in social settings or through personal relationships.
Another possible source for first-time drug users is curiosity. Some individuals may have a natural curiosity and decide to try a drug out of interest or because they want to experience its effects.
Lastly, some individuals may be introduced to drugs through family members who are already using drugs. This could be due to exposure within the household or influence from family members who are using drugs.
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