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

  Learn about heroin overdose Drug overdose is now the leading cause of death among Americans under 50 years of age. Heroin overdose is a type of drug overdose that is classified as opioid poisoning. More than 80% of poisonings occur via the m

    Opium Morphine and Heroin Opium comes from the sap of the papaver somniferum poppy plant. Morphine comes from opium. Heroin is derived from morphine.   Heroin often looks differently in different places. In gen

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