Heroin (diacetylmorphine (INN)), also known as diamorphine (BAN, or, especially in older literature, as morphine diacetate), is a semi-synthetic opioid drug synthesized from morphine, a derivative of the opium poppy. It is the 3,6-diacetyl ester of morphine (di-acetyl-morphine) and a morphine prodrug.

The Withdrawal Syndrome from heroin / diacetylmorphine

The Withdrawal syndrome from diacetylmorphine (the so-called cold turkey) may begin within 6 to 24 hours of discontinuation of the drug; however, this time frame can fluctuate with the degree of tolerance as well as the amount of the last consumed dose. Symptoms may include: sweating, malaise, anxiety, depression, akathisia, priapism, extra sensitivity of the genitals in females, general feeling of heaviness, cramp-like pains in the limbs, excessive yawning or sneezing, tears, rhinorrhea, sleep difficulties (insomnia), cold sweats, chills, severe muscle and bone aches; nausea and vomiting, diarrhea, cramps, and fever.