Side-by-Side Comparison · 2026

Angiotensin II vs Sarafotoxin

Angiotensin II vs Sarafotoxin — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Angiotensin II
Vasoactive Peptide

Angiotensin II is the principal effector peptide of the renin-angiotensin-aldosterone system (RAAS), a master regulator of blood pressure, fluid balance, and cardiovascular function. Generated by sequential cleavage of angiotensinogen by renin (producing Ang I) then by angiotensi...

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Sarafotoxin
Vasoactive Peptide

Sarafotoxins are a family of 21-amino acid peptides isolated from the venom of the Israeli burrowing asp (Atractaspis engaddensis). They are structural and functional homologs of endothelin-1, sharing ~60% sequence identity and acting on the same ETA/ETB receptor subtypes....

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Key Parameters
Parameter Angiotensin II Sarafotoxin
Category Vasoactive Peptide Vasoactive Peptide
Research Clinical Pharmacological Tool
Half-Life 30 seconds - 2 minutes (plasma) Minutes (plasma)
Typical Dose 20-40 ng/kg/min (vasopressor) Research only (nmol/kg)
Frequency Continuous infusion in clinical use N/A
Route Intravenous (continuous infusion) IV (research only)
FDA Status Approved (Giapreza, vasodilatory shock) No approval

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Frequently Asked Questions
What is the difference between Angiotensin II and Sarafotoxin?
Angiotensin II: Angiotensin II is the principal effector peptide of the renin-angiotensin-aldosterone system (RAAS), a master regulator of blood pressure, fluid balance, and cardiovascular function. Generated by sequ... Sarafotoxin: Sarafotoxins are a family of 21-amino acid peptides isolated from the venom of the Israeli burrowing asp (Atractaspis engaddensis). They are structural and functional homologs of endothelin-1, sharing...
Which has a longer half-life, Angiotensin II or Sarafotoxin?
Angiotensin II half-life: 30 seconds - 2 minutes (plasma). Sarafotoxin half-life: Minutes (plasma).
Can you stack Angiotensin II and Sarafotoxin?
Angiotensin II and Sarafotoxin are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.