What is the correct ciprofloxacin (Cipro) otic suspension dose for a 49‑lb (≈22 kg) child?

Ciprofloxacin Otic Dosing for 49-lb Child

For a 49-lb (22 kg) child aged 1 year or older with acute otitis externa or tympanostomy tube-associated otorrhea, administer 3 drops of ciprofloxacin otic suspension into the affected ear twice daily for 7 days 1.

Dosing Algorithm

The dosing for ciprofloxacin otic suspension is not weight-based but rather standardized by age:

• Age ≥1 year (including your 49-lb patient): 3 drops in affected ear twice daily × 7 days 1
• This applies to both children and adults equally 1

Administration Technique

To maximize efficacy and minimize adverse effects:

1. Warm the bottle by holding in hand for 1-2 minutes before instillation (prevents dizziness from cold solution) 1
2. Shake well immediately before each use 1
3. Patient lies with affected ear upward 1
4. Instill 3 drops 1
5. Maintain position for 30-60 seconds to allow penetration 1
6. Repeat for opposite ear if needed 1
7. Discard unused portion after completing therapy 1

Clinical Context

Ciprofloxacin otic is appropriate for acute otitis externa and tympanostomy tube-associated otorrhea, targeting Pseudomonas aeruginosa, Staphylococcus aureus, and mixed gram-positive/gram-negative organisms 2. Systemic toxicity is not a concern with topical otic therapy 2, as demonstrated by minimal systemic absorption (peak plasma levels of only 1.33 ng/mL in pediatric patients) 3.

Key Pitfalls to Avoid

• Do not calculate weight-based dosing for otic preparations—this is a fixed-drop regimen 1
• Do not use in eyes 1
• Avoid dropper contamination from ear, fingers, or other sources 1
• If no improvement after 1 week, obtain cultures to guide further treatment (possible resistant organisms or fungal overgrowth) 1
• Discontinue immediately if rash or allergic reaction occurs 1