The mechanism of action of promethazine is as follows: …
The mechanism of action of promethazine is as follows: (1)The mechanism of action of promethazine is as follows:1. Blocks the actions of histamine at H2-receptors2. Stabilizes mast cells and inhibits the release of allergic mediators 3. Blocks the actions of histamine at H1-receptors 4. Activates α-and β-adrenoceptors to produce the opposite effects to histamine5. Prevents the biphasic reaction in anaphylaxis
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