Penicillin is

Drugs used to bind to receptors,inhibiting their natural function and blocking a message,are called:

Which of the following substances used as an analgesic is non-narcotic?

Sulphaguanidine is used for:

Consider the following:
Assertion $(A)$: Aspirin is useful in the prevention of heart attacks.
Reason $(R)$: Aspirin acts as an anti-blood clotting agent.
The correct answer is:

Why are cimetidine and ranitidine better antacids than sodium hydrogencarbonate or magnesium or aluminium hydroxide?