Inj metronoidazole dose in 11year old with weight 15.5 kg

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IV Metronidazole Dose — 11-year-old, 15.5 kg

Standard Pediatric IV Dose

Parameter	Value
Dose	7.5 mg/kg IV every 6 hours
Weight	15.5 kg
Calculated dose	7.5 × 15.5 = ~116 mg per dose
Practical rounding	115–120 mg IV q6h

Source: Rosen's Emergency Medicine — "Metronidazole 7.5 mg/kg IV q6h" for pediatric patients.

Additional Reference Points

Goodman & Gilman / Dermatology: Pediatric dose 30 mg/kg/day in divided doses every 6 hours — this gives the same result: 30 × 15.5 = 465 mg/day ÷ 4 = ~116 mg per dose
Maximum single dose: Should not exceed adult dose (500 mg per dose) — well within range here.
Infusion: Give each dose as a slow IV infusion over 30–60 minutes; do not give as a rapid bolus.

Summary


Dose per administration	~115–120 mg IV
Frequency	Every 6 hours (q6h)
Daily total	~465 mg/day
Route	Slow IV infusion (30–60 min)

Note: Dose is weight-based (7.5 mg/kg/dose). Always verify against local formulary and adjust for indication (anaerobic infections, intra-abdominal sepsis, etc.).

In 8 hourly

Checking Date & Time

For 8-hourly (q8h) dosing, the same total daily dose is divided into 3 doses instead of 4.

IV Metronidazole — q8h Dosing (15.5 kg)

The alternative regimen uses 10 mg/kg/dose every 8 hours (same daily total of ~30 mg/kg/day):

Parameter	Value
Dose	10 mg/kg IV every 8 hours
Weight	15.5 kg
Calculated dose	10 × 15.5 = 155 mg per dose
Frequency	Every 8 hours (q8h)
Daily total	~465 mg/day

Give as slow IV infusion over 30–60 minutes.

Quick Comparison

Regimen	Dose	Frequency	Daily Total
q6h	~116 mg	4× daily	~465 mg
q8h	155 mg	3× daily	~465 mg

Both regimens deliver the same ~30 mg/kg/day total. The q8h schedule is commonly used in practice for convenience.

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