Final answer:
Pindolol is the non-selective β-receptor antagonist with intrinsic sympathomimetic activity, distinguishing it from other β-blockers by its ability to partially activate β-receptors while blocking adrenaline's full effects.
Step-by-step explanation:
The non-selective β-receptor antagonist with intrinsic sympathomimetic activity is Pindolol.
β-blockers are a type of sympatholytic drug used in the treatment of cardiovascular diseases. They work by blocking the effects of adrenaline on the β-receptors associated with vasoconstriction and cardioacceleration. This action helps in dilating blood vessels and preventing increases in heart rate, thus improving cardiac function.
Non-selective β-blockers like propranolol bind to all β-receptors, while selective ones, like metoprolol, target β1-receptors specifically. Pindolol is unique among β-blockers because it not only blocks the β-receptors but also has intrinsic sympathomimetic activity, meaning it can partially activate β-receptors while blocking the full effects of naturally occurring sympathetic neurotransmitters like adrenaline.