An antagonist of the 5-HT2B (pki = 8.0-9.4) and 5-HT2C (pki = 8.6-9.1) receptor. At the 5-HT1A and some other 5-HT receptors it serves as a partial agonist. It is known to have partial agonist effects on other 5-HT receptors as well. In neuronal and platelet culture, Methysergide blocks serotonin action with an IC50 = 18uM. Originally developed in the 1960′s as a migraine/cluster headache treatment, but discontinued due to significant physiological and pyschotropic side effects. Methysergide is still actively used in research as a 5-HT2 receptor antagonist in both in vivo and in vitro experiments.
Molecular Formula:C₂₁H₂₇N₃O₂·C₄H₄O₄
Solubility:H2O
Primary Target:5-HT
Molecular Weight:469.54
Appearance:Supplied as an off-white solid.
Storage and Stability:May be stored at 4°C. For long-term storage, aliquot and store at 4°C. Do not freeze. For maximum recovery of product, centrifuge the original vial prior to removing the cap. Further dilutions can be made in assay buffer.
