You cannot compare Concor (bisoprolol) and Propranolol SR directly just by looking at the milligram strength, because: • They are different beta-blockers. • They have different potency, receptor selectivity, and duration of action. Concor (bisoprolol) • Cardio-selective beta-1 blocker. • Very potent even at low doses. • Long acting (once daily). Propranolol SR 20 mg • Non-selective beta-blocker (beta-1 and beta-2). • Generally requires higher milligram doses to achieve similar heart-rate or BP control. • Sustained-release form gives longer effect than immediate release. Approximate clinical equivalence (not exact): • Bisoprolol 1.25 mg ≈ Propranolol 20–40 mg per day in beta-blocking effect. So in practical terms: • Concor 1.25 mg is not a “low-strength” drug just because the number looks small. • It is roughly similar or slightly stronger than propranolol SR 20 mg in effect on heart rate and blood pressure.

Propranolol

Propranalol

Concor is Brand name contains BISOPROLOL(pharmaceutical name) Propanolol is pharmaceutical name Both are beta blockers with low dosage strength

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Both have same mechanism of action and are of same class. Please share details of your problem,  then I can guide you further

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Both durgs are of same class. Need to know the indication for use of drug.

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