2. CLASSIFICATION OF β-BLOCKERS
According to receptor selectivity
1-Non-selective-(β1 + β2)
Propranolol
Timolol
2- Selective-(β1)
Atenolol
Metoprolol
α and β mixed
Labetalol and Carvedilol
3/11/2023 ANS 2
3. PHARMACOLOGICAL EFFECTS
Heart :
↓ Force of contraction
↓ Heart rate
↓ Cardiac output
↓ Blood pressure
Lungs:
Bronchoconstriction
3/11/2023 ANS 3
4. PHARMACOLOGICAL EFFECTS
Skeletal muscle
Inhibits tremor related with anxiety
↓ exercise capacity
Metabolic effect
1- Hyperlipidemia
2- Hypoglycemia
Eye
↓ intraocular pressure by ↓ the secretion of aqueous humor
3/11/2023 ANS 4
13. ADVERSE EFFECTS OF α-BLOCKERS
1-Orthostatic hypotension
First dose syncope or First dose effect (Prazosin)
2-Tachycardia
3-Nasal Congestion
4-Inhibition of ejaculation
Editor's Notes
It is a tumor of the adrenal medulla or sympathetic Ganglion cells. It secretes catecholamines, especially NE and EPI