When using your water pipe for different substances, avoid these common pitfalls: Neglecting Cleaning : Residue buildup can ruin the flavor and effectiveness of your pipe.

Hallucinogens, which have a different clinical profile than other commonly misused substances, required fewer quit attempts.

Chemists find new pharmaceutically active substances from billions of newly combined molecules. by Daniel Meierhans, ... but billions of different substances within a few weeks.

Hallucinogens, which have a different clinical profile than other commonly misused substances, required fewer quit attempts. Researchers also found that tranquilizers had a substantially higher ...