“Smack” is the “common” name for
**Core Concept**
Heroin, a potent opioid analgesic, is commonly referred to as "smack" on the streets. Its pharmacological effects are mediated through binding to opioid receptors in the brain, leading to euphoria, analgesia, and respiratory depression.
**Why the Correct Answer is Right**
Heroin is a semi-synthetic opioid derived from morphine, which is extracted from the opium poppy plant (Papaver somniferum). It exerts its effects by binding to mu-opioid receptors (MOR) in the brain, spinal cord, and other areas, leading to the release of dopamine, endorphins, and other neurotransmitters that produce its characteristic effects. The rapid onset of action and high potency of heroin contribute to its high abuse potential.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a common name for any well-known medication or substance.
**Option B:** Cocaine is a different type of illicit substance, commonly referred to as "coke" or "snow."
**Option C:** This option is not a recognized name for any medication or substance.
**Clinical Pearl / High-Yield Fact**
Patients addicted to heroin often exhibit tolerance and withdrawal symptoms upon cessation, which can be managed with opioid replacement therapy (ORT) or medication-assisted treatment (MAT) using medications like methadone or buprenorphine.
**Correct Answer: C. Heroin**