Designer drug and Psychoactive drug

Designer drug noun - A psychoactive drug deliberately synthesized to avoid anti-drug laws; mimics the effects of a banned drug; law was revised in 1986 to ban designer drugs.

Psychoactive drug and designer drug are semantically related. In some cases you can use "Psychoactive drug" instead a noun phrase "Designer drug".

Psychoactive drug noun - A drug that can produce mood changes and distorted perceptions.

Designer drug and psychoactive drug are semantically related. Sometimes you can replace phrase "Designer drug" with "Psychoactive drug", this phrases are similar.