It depends on the drugs. Most illegal drugs are illegal because they're harmful in some way, but just being illegal is harm enough for them to be worth avoiding.
Drugs that are prescribed by a doctor are medical drugs.
drugs, drugs and drugs
Hard drugs
Licit drugs are drugs that are legal.
illicit drugs are control drugs while licit are drugs that are not control
no drugs are good drugs rule
Unproven drugs are drugs that are against the law.
These drugs include amphetamines, antidepressant drugs, antipsychotic drugs, caffeine , and lithium.
Drugs that control vomiting are called antiemetic drugs.
Drugs education is the education of teaching others about drugs.
Cytotoxic drugs-- Drugs that function by destroying cells.
Drugs can interact with other drugs, foods, and beverages