Almogran is a selective 5-HT1B/1D receptor agonist that alleviates migraine by constricting cerebral blood vessels and inhibiting neuropeptide release. Its drug interactions mainly involve the CYP enzyme system and 5-hydroxytryptamine drugs. The following is a detailed explanation of the mechanism of action and interactions of the drug.

mechanism of action

1. Vasoconstrictive effect

Selective activation of 5-HT1B receptors in intracranial blood vessels can reverse abnormal vasodilation during migraine attacks and alleviate pulsatile headaches.

2. Neuroregulatory effect

By stimulating the 5-HT1D receptors at the trigeminal nerve endings, the release of pain inducing substances such as calcitonin gene-related peptide (CGRP) is inhibited.

3. Central analgesic effect

It may exert its effect through the brainstem pain regulation pathway, reducing the transmission of pain signals to higher centers.

Drug interactions

1. Serotonin can interact with drugs

The combination of SSRI/SNRI antidepressants (such as fluoxetine and sertraline) may cause serotonin syndrome, characterized by high fever, tremors, and consciousness disorders, requiring close monitoring of neurological symptoms.

2. Monoamine oxidase inhibitors (MAOIs)

Do not use it in combination with MAOIs (such as phenylhydrazine and selegiline), as it significantly inhibits 5-HT metabolism, leading to hypertensive crisis and severe central toxicity.

3. Other Triptolide drugs

Avoid using similar drugs such as sumatriptan in combination within 24 hours, as the combined vasoconstrictive effect may induce myocardial ischemia or cerebral vasospasm.

4. CYP3A4 metabolism related drugs

Strong CYP3A4 inhibitors (such as ketoconazole) may increase the blood concentration of amotriptan and should be reduced or avoided in combination; Inducing agents (such as rifampicin) may reduce efficacy.

5. Vasoactive drugs

Combined use with ergotamine derivatives can cause persistent vascular spasms, requiring dosing at intervals of at least 24 hours; The effect of antihypertensive drugs may be antagonized, and blood pressure changes need to be monitored.

6. Multi valent cationic drugs

Although antacids or mineral supplements (such as calcium carbonate) do not affect their efficacy, it is recommended to take them every 2 hours to avoid potential absorption interference.