The Risks of Inaccurate Dosing in Children

Ensuring precise medication delivery is a fundamental challenge in neonatal and child health. Often, clinicians and parents resort to pediatric tablet splitting to achieve smaller, age-appropriate doses. However, recent evidence suggests this common practice may compromise patient safety due to significant dose variability. Precise dosing is particularly critical for drugs with narrow therapeutic indices, where even minor deviations can lead to toxicity or treatment failure.

Study Findings: Variability in Split Fragments

A recent study evaluated the accuracy of splitting tablets such as mercaptopurine, azathioprine, and spironolactone. Researchers used a manual splitter to prepare half and quarter fragments. Consequently, the findings revealed alarming variability, with coefficients of variation ranging from 8.6% to 23.3%. Most fragments failed the stringent mass uniformity criteria established by the European Pharmacopoeia. Furthermore, content analysis showed that only 50% to 70% of quarter-tablets complied with accepted drug limits. Specifically, some fragments contained as little as 52% or as much as 133% of the intended dose. Therefore, weighing fragments alone remains an unreliable method for ensuring dosage accuracy.

Enhancing Precision in Pediatric Tablet Splitting

In the Indian clinical context, experts like Dr. Sudhir Kumar have warned that splitting tablets without functional score lines can destroy protective coatings. This manipulation may trigger an immediate release of medication intended for sustained absorption. Moreover, the lack of pediatric-specific strengths in the market often forces this practice. To mitigate these risks, medical educators recommend using low-strength tablets or liquid formulations whenever available. Additionally, if splitting is unavoidable, clinicians must educate caregivers on the physical properties of the specific medication and the limitations of manual splitting tools.

Frequently Asked Questions

Is it safe to split all scored tablets for children?

Not necessarily. While a score line suggests the manufacturer designed the tablet for division, the accuracy of pediatric tablet splitting still varies. You should always confirm if the drug has a narrow therapeutic index or a specific coating that could be compromised.

What are the alternatives to splitting adult-strength tablets?

Whenever possible, pharmacists and doctors should prioritize commercially available liquid suspensions or pediatric-strength mini-tablets. These formulations provide a much higher degree of dosing precision than manual fragments.

Disclaimer: This content is for informational and educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment. Refer to the latest local and national guidelines for clinical practice.

References

1. Hodkinson C et al. Accuracy of tablet splitting for paediatric dosing: mass and content uniformity. Int J Pharm Pract. 2026 Apr 20. doi: undefined. PMID: 42008341.

2. Kumar S. Splitting medicines can harm your health if done incorrectly. The Times of India. 2025 Sep 4.

3. Andersson Å. Dividing the Tablets for Children–Good or Bad? Pharmaceutical Methods. 2016 Jan 15;7(4).