Drug Tolerance Drug tolerance is "a decline in effects following repeated use." Consequently, more and more of a substance must be consumed, in order to achieve the same intensity of effect. Heroin tolerance is no different. Over time, mor

Unborn Child The adult brain exists in a well-protected stable environment, which is due, in part, to a semi-permeable membrane that separates circulating blood from the brain. This membrane is referred to as the Blood–Brain-Barrier (BBB). It he

Testosterone is an essential component of a person's sexual health. That is why it's important to understand the full impact that heroin plays on testosterone levels.   Androgens and Testosterone Androgens are sex steroid hormones. They are m

Elimination half-life The "elimination half-life" is the time period it takes for the plasma concentration of a drug to be halved. Hence, each successive half-life, less drug is eliminated. After one half-life the amount of drug remaining in the b

  What is Addiction? Addiction is an uncontrollable drive to do something. Drug addiction is an uncontrollable drive to consume a particular drug. The Allure of Heroin   Drug Addiction Any drug that produces changes in brain reinforc

What to expect It's nice to help a friend. But if you're planning on helping someone quit heroin, you should know how to help them. First of all, your friend is likely to experience a variety of withdrawal symptoms, including body aches, sneezi