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for educational and safety purposes
Amitriptyline and Nortriptyline both come up in the same conversations; they overlap on Serotonin and Norepinephrine. Amitriptyline: Amitriptyline is a tricyclic antidepressant introduced in the early 1960s, originally for major depression and now used at least as often for chronic pain conditions. Nortriptyline: Nortriptyline is a secondary-amine tricyclic antidepressant and the active metabolite of amitriptyline, distinguished among tricyclics by its relative selectivity for norepinephrine reuptake inhibition over serotonin.
Amitriptyline is a tricyclic antidepressant introduced in the early 1960s, originally for major depression and now used at least as often for chronic pain conditions. It relieves symptoms by increasing the availability of the neurotransmitters serotonin and norepinephrine, while also blocking histamine, acetylcholine, and adrenergic receptors, which accounts for both its sedating quality and many of its side effects [1]. Common uses today include neuropathic pain, fibromyalgia, and the prevention of migraine and tension headaches, in addition to depression [3][4].
Nortriptyline is a secondary-amine tricyclic antidepressant and the active metabolite of amitriptyline, distinguished among tricyclics by its relative selectivity for norepinephrine reuptake inhibition over serotonin. It is notable for a well-defined curvilinear therapeutic plasma window, an early landmark in therapeutic drug monitoring, and it is generally better tolerated than tertiary-amine tricyclics in older patients. Beyond depression, it is widely used off-label for neuropathic pain and migraine prophylaxis, effects attributed partly to blockade of voltage-gated sodium channels that also underlies its local-anesthetic activity and, in overdose, its cardiotoxicity. It has additionally demonstrated efficacy as an aid to smoking cessation. Approved in the United States in 1964, it remains an inexpensive generic.
both fingerprints on one instrument; where the marks line up the two compounds work the same lever, where a slot goes dark only one of them touches it. read straight from each entry's affinity table; nothing here is invented.
inhibits
Reuptake inhibition
inhibits
Reuptake inhibition
antagonist
antagonist
blocks
blocks
Antagonist
Antagonist
Antagonist
strengths are the entries' qualitative ratings (strong / moderate / weak); Ki and EC50 figures appear where an entry records them.
easiest to source: Amitriptyline is currently listed by more trusted vendors (2), so it's the simpler one to get hold of. for effects and safety, read each full entry; this is educational, not medical advice.