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Description: Tricyclic antidepressant similar in action and side effects to imipramine. It may produce excitation. [PubChem]
Drug Type: Small Molecule; Approved
Pharmacology: Protriptyline is a tricyclic antidepressant. It was thought that tricylic antidepressants work by inhibiting the re-uptake of the neurotransmitters norepinephrine and serotonin by nerve cells. However, this response occurs immediately, yet mood does not lift for around two weeks. It is now thought that changes occur in receptor sensitivity in the cerebral cortex and hippocampus. The hippocampus is part of the limbic system, a part of the brain involved in emotions. Presynaptic receptors are affected: a1 and b1 receptors are sensitized, a2 receptors are desensitised (leading to increased noradrenaline production). Tricyclics are also known as effective analgesics for different types of pain, especially neuropathic or neuralgic pain. A precise mechanism for their analgesic action is unknown, but it is thought that they modulate anti-pain opioid systems in the CNS via an indirect serotonergic route. They are also effective in migraine prophylaxis, but not in abortion of acute migraine attack. The mechanism of their anti-migraine action is also thought to be serotonergic.
Mechanism of Action: Protriptyline acts by decreasing the reuptake of norepinephrine and serotonin (5-HT).
Indication: For the treatment of depression and obsessive-compulsive disorders.
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Thought leaders and organizations working on research involving Vivactil.

  • F Sériès
  • Y Cormier
  • Ulysses J Magalang
  • Y Huang
  • B V Vaughn
  • Roxane Laboratories
  • Emory University
  • Memorial Sloan-Kettering Cancer Center
  • Schering-Plough
  • University of Nebraska
  • Université Laval
  • Papworth Hospital
  • Hôpital Laval
  • Chinese University of Hong Kong
  • Kangwon National University College of Medicine

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