Cyproheptadine Syrup — Dosing in a 1.5-Year-Old (Toddler)

Standard Formulation

• Cyproheptadine syrup: 2 mg / 5 mL

Age-Based Dose

A 1.5-year-old (18 months) falls just below the standard licensed age range (2–6 years). However, in clinical practice, it is commonly used off-label in this age group.

Weight-Based Dose (preferred for accurate dosing)

• 0.25 mg/kg/day in divided doses (every 8–12 hours)

• Total daily dose ≈ 2.5–2.75 mg/day
• Per dose (TDS/BD): ~1 mg every 8 hrs or ~1.25 mg every 12 hrs
• In syrup terms: approximately 2.5–3 mL per dose

Key Points

• Indication in this age group: most commonly used as an appetite stimulant or for allergic conditions (urticaria, allergic rhinitis)
• Formulation: Syrup 2 mg/5 mL is standard
• Not recommended below 2 years by many product labels — use only under physician guidance
• Side effects: Sedation (most common), dry mouth, irritability
• Caution: Avoid in neonates and premature infants; use cautiously in children <2 years due to potential for paradoxical CNS stimulation or excessive sedation

Note: Always follow the prescribing physician's instructions. For children under 2 years, dosing should be individualized based on weight and clinical indication.