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How Long Does Promethazine Stay In Your System?

Promethazine is a first-generation antihistamine of the “phenothiazine” classification often prescribed for the treatment of postoperative nausea, vomiting, and motion sickness.  It is commonly utilized as an adjunct to narcotic analgesics to increase their efficacy among those experiencing acute or chronic pain.  Additionally, promethazine is sometimes administered for the treatment of the common cold and …

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How Long Does Spice / “K2” Stay In Your System?

Spice and “K2” refer to various retail products containing herbs laced with synthetic cannabinoids.  The synthetic cannabinoids within Spice and K2 are often considered functionally similar to THC (delta-9-tetrahydrocannbinol) derived from cannabis in that they bind to cannabinoid receptors within the brain, and act as agonists.  This cannabinoid receptor agonism facilitates intoxicating effects similar to …

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How Long Does Chantix Stay In Your System?

Chantix (Varenicline) is a drug marketed by Pfizer for the treatment of nicotine addiction.  It functions as a selective, competitive partial agonist at α4β2 (alpha-4-beta-2) nAChRs.  Competitive partial agonism at the α4β2 receptors decreases the binding of nicotine to these receptors, thereby modulating the release of dopamine in the mesolimbic pathway as triggered by nicotine …

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How Long Does Fentanyl Stay In Your System?

Fentanyl is a synthetic opioid drug that was originally synthesized in the early 1960s by Paul Janssen, founder of Janssen Pharmaceutica.  The drug initially gained mainstream popularity as a general anesthetic in the 1960s under the brand “Sublimaze”, a compound consisting of fentanyl and citric acid.  It wasn’t until the 1990s that fentanyl was approved …

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How Long Does Klonopin (Clonazepam) Stay In Your System?

Klonopin (Clonazepam) is a benzodiazepine medication utilized primarily for the treatment of anxiety disorders and acute epilepsy.  It is also prescribed off-label for a host of other medical conditions including: acute mania, akathisia, bruxism, insomnia, and restless leg syndrome.  As a benzodiazepine, it functions principally by modulating the neurotransmission of GABA (gamma-aminobutyric acid) within the …

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