Appropriate Prescribing of Specialist Infant Formulae

1. Introduction

Specialist infant formulae (SIF) are nutritionally modified milks designed for infants with specific medical or dietary needs. In Staffordshire, the prescribing of these products is governed by a set of evidencebased guidelines intended to ensure that infants receive the right product, at the right time, for the right reason, while also protecting the NHS budget.

2. When to Consider Specialist Infant Formulae

2.1 Clinical Indications

• Diagnosed cowmilk protein allergy (CMPA) or intolerance
• Severe lactose intolerance or galactosaemia
• Metabolic disorders (e.g., phenylketonuria)
• Preterm or lowbirthweight infants with high nutritional requirements
• Failure to thrive despite standard feeding strategies
• Specific gastrointestinal disorders (e.g., severe reflux, short bowel syndrome)

2.2 Contraindications for Use of Standard Infant Formula

If an infant shows persistent symptoms such as vomiting, persistent diarrhoea, unexplained rash, or poor weight gain while on standard breastmilk substitutes, a review for SIF is warranted.

3. Selection of the Appropriate Formula

The choice of formula must be guided by the underlying diagnosis and the infants nutritional requirements.

1. Extensively Hydrolysed Formula (eHF): Firstline for most cases of CMPA where an allergy is confirmed or strongly suspected.
2. Soybased Formula: Considered only when eHF is not tolerated or is contraindicated; not suitable for infants with multiple food allergies.
3. Aminoacidbased Formula (AAF): Reserved for infants with severe or refractory CMPA, or where an eHF has failed.
4. Lactosefree Formula: Indicated for lactose intolerance or secondary lactase deficiency.
5. Preterm/Lowbirthweight Formula: Provides higher protein, energy, and mineral content for infants <37weeks gestation or <2kg birthweight.

Prescribers must reference the products summary of characteristics (SmPC) and ensure that the selected formula aligns with the infants specific clinical picture.

4. Prescribing Process

4.1 Documentation

Each prescription should include:

• Infants full name, date of birth and NHS number
• Clear clinical indication (e.g., CMPA confirmed by skin prick test)
• Formula brand, strength and quantity (e.g., 400g tub, 2months supply)
• Start and review dates
• Signature of the prescriber

4.2 Prior Authorization

For most SIFs, the Staffordshire Clinical Commissioning Group (CCG) requires electronic prior authorization via the NHS eprescribing service. The request must be accompanied by a brief justification and any relevant investigation results.

4.3 Review Intervals

Prescriptions are typically issued for 46weeks. A review should be scheduled to assess growth, symptom resolution and the need for continuation. Repeat prescribing without review is discouraged.

5. Monitoring and Outcome Measures

Effective monitoring ensures that the infant benefits from the formula and that resources are used wisely.

• Growth Tracking: Weight, length and head circumference measured at each clinic visit; plotted on WHO growth charts.
• Symptom Diary: Parents should record feeding volumes, any adverse reactions, stool patterns and episodes of vomit or colic.
• Laboratory Tests: Where relevant, serum allergenspecific IgE, lactase activity, or metabolic panels should be repeated after a trial period.
• Weaning Progress: Evaluate readiness to introduce solid foods and transition back to standard formula or breastmilk.

6. CostEffectiveness Considerations

Specialist formulas are considerably more expensive than standard milks. Prescribers must balance clinical need with fiscal responsibility:

• Use the least expensive formula that meets the clinical requirement (eHF before AAF).
• Avoid duplication ensure that only one brand is prescribed at a time unless a switch is clinically indicated.
• Consider community healthteam input to support optimal feeding practices and reduce unnecessary prescriptions.

7. Role of the MultiDisciplinary Team

Effective prescribing relies on collaboration:

• Pediatricians & Neonatologists: Diagnose and decide on the need for SIF.
• Specialist Dietitians: Provide feeding plans, educate parents, monitor nutritional status.
• GPs & Community Nurses: Carry out routine checks, arrange reviews and manage repeat prescriptions.
• Pharmacists: Verify appropriateness, handle prior authorisation and counsel families on storage and preparation.

8. Patient & Parent Information

Clear information empowers families:

• Explain why a specialist formula is needed and expected duration.
• Demonstrate correct preparation, sterilisation and feeding techniques.
• Provide contact details for urgent concerns (e.g., worsening rash or failure to thrive).
• Offer written leaflets and reputable online resources, such as the NHS Better Health website.

9. Escalation Pathway

If an infant does not respond to the chosen formula after an appropriate trial period (usually 24weeks), the following steps are recommended:

1. Reevaluate the diagnosis with the specialist dietitian.
2. Consider alternative formula types (e.g., switch from eHF to AAF).
3. Arrange referral to a tertiary paediatric gastroenterology centre for further investigation.
4. Document all actions and decisions within the infants electronic health record.

10. Summary

The Staffordshire guideline for the appropriate prescribing of specialist infant formulae emphasizes evidencebased selection, robust documentation, regular review and multidisciplinary collaboration. By adhering to these principles, clinicians can ensure that infants with complex feeding needs receive optimal nutrition while safeguarding NHS resources.

For further information, consult the full Staffordshire Clinical Commissioning Group formulary or contact the local paediatric nutrition lead.