Intravenous anesthetic and Truth serum

Intravenous anesthetic noun - An anesthetic that produces anesthesia when injected into the circulatory system.

Truth serum and intravenous anesthetic are semantically related. In some cases you can replace phrase "Truth serum" with "Intravenous anesthetic", this phrases are similar.

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

Intravenous anesthetic and truth serum are semantically related. You can use "Intravenous anesthetic" instead a noun phrase "Truth serum".