Correct Answer » D Explanation

Liraglutide is a GLP-1 (Glucagon-Like Peptide-1) receptor agonist.

Mechanism:

• ↑ Satiety (acts on hypothalamus)

• ↓ Appetite

• Delays gastric emptying

Indication:

• Chronic weight management

• BMI ≥30 kg/m²

• BMI ≥27 kg/m² with comorbidities

Brand used for obesity: Saxenda

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Why Other Options Are Wrong

A. Sibutramine

• Serotonin–norepinephrine reuptake inhibitor

• Withdrawn worldwide

• Causes cardiovascular events

B. Fenfluramine

• Serotonin releasing drug

• Withdrawn due to valvular heart disease & pulmonary hypertension

C. Metformin

• Used for Type 2 diabetes

• Causes mild weight loss but not approved for obesity treatment