Q: Is a drug any substance that? ¶
A: Yes, when inhaled, injected, smoked, consumed, absorbed via a patch on the skin, or dissolved under the tongue, causes a physiological change in the body.
Q: Are drugs usually categorised into drug classes? ¶
Q: Are drugs an international treaty brought about in 1961 to prohibit the use of narcotics save for those used in medical research and treatment? ¶
Q: Are drugs chemical substances that affect the function of the central nervous system? ¶
A: Yes, and altering perception, mood or consciousness.
Q: Are drugs illicit and international treaties such as the Single Convention on Narcotic Drugs exist for the purpose of their prohibition? ¶
Q: Are drugs often classified into drug classes—groups of related drugs that have similar chemical structures? ¶
A: Yes, and the same mechanism of action , a related mode of action, and that are used to treat the same disease.
Q: Were drugs obtained through extraction from medicinal plants? ¶
A: Yes, but more recently also by organic synthesis.