04.03.2013 Views

color pdf

color pdf

color pdf

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

BIMM118<br />

Sympatholytics<br />

α - selective antagonists<br />

Adrenergic System - Antagonists<br />

Promote vasodilation => decreased peripheral resistance => blood pressure <br />

(Side effects: reflex tachycardia and postural hypotension)<br />

Relaxation of the smooth muscles in the bladder neck<br />

Clinical applications:<br />

Hypertension; Urinary retention<br />

Non-selective α-antagonist:<br />

• Phentolamine (for pheochromocytoma)<br />

• Ergot alkaloids see 5HT receptor<br />

α 1 -selective antagonists:<br />

• Prazosin (Minipress®)<br />

first α 1 - selective antagonist<br />

• Terazosin longer half-life<br />

• Doxazosin longer half-life

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!