Ataractic drug and Minor tranquillizer

Ataractic drug noun - A drug used to reduce stress or tension without reducing mental clarity.

Minor tranquillizer and ataractic drug are semantically related. In some cases you can replace phrase "Minor tranquillizer" with "Ataractic drug", this phrases are similar.

Minor tranquillizer noun - A tranquilizer used to relieve anxiety and reduce tension and irritability.

Ataractic drug and minor tranquillizer are semantically related. You can use "Ataractic drug" instead a noun phrase "Minor tranquillizer".