Codeine was discovered in 1832 by French chemist Pierre-Jean Robiquet. Typically it is derived from the more potent drug morphine, which, depending on dosage route (oral, injection), is considered about 3 to 12 times stronger than codeine.

Diazepam is a widely used sedative anti-anxiety medication.

This video (Episode 1) explains the signs and symptoms bipolar disorder (manic depression). If you suspect that you, or someone you know may be bipolar then you should watch this video. You will learn the common signs and symptoms of this mental illness.

The therapeutic properties and advantages of the medicinal herb St. John's Wort, and preparations derived from it, have been known for more than 2,000 years.

At the beginning of XIX century bromides were used in the role of anti-anxiety medications and at the beginning of XX century – their place was occupied by barbituric acid – barbiturates.