The mnemonic
HAV1 M&M
What each word stands for
- HHistamine H1
- AAlpha-1 adrenergic
- V1Vasopressin V1
- MMuscarinic M1
- MMuscarinic M3
Why it matters clinically
Gq raises IP3 and calcium, explaining vasoconstriction and smooth muscle contraction.
Where it stops being reliable
Covers only Gq; Gs and Gi receptors need separate recall.
Teaching aid, still awaiting independent review. Confirm facts in a standard source.