Truth drug and Thiopental sodium

Truth drug noun - An intravenous anesthetic drug that has a hypnotic effect; induces relaxation and weakens inhibitions; is believed to induce people to talk freely.

Thiopental sodium and truth drug are semantically related. In some cases you can use "Thiopental sodium" instead a noun phrase "Truth drug".

Thiopental sodium noun - Barbiturate that is a hygroscopic powder (trade name Pentothal) that is a strong barbiturate that acts rapidly; induces a relaxed state when injected as a general anesthetic.

Truth drug and thiopental sodium are semantically related. You can use "Truth drug" instead a noun phrase "Thiopental sodium".