Number Needed to Treat and Cost Per Responder Analysis of Anti-CGRP Monoclonal Antibodies for Migraine Prevention in Adults for Whom Prior Preventive Treatments have Failed

Sep 23, 2025Advances in therapy

Number Needed to Treat and Cost for Migraine Prevention Using Anti-CGRP Antibodies in Adults Who Didn’t Respond to Previous Treatments

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Abstract

The (NNT) for achieving a ≥ 50% reduction in monthly migraine days (MMDs) with anti-CGRP monoclonal antibodies ranges from 2.7 to 6.0.

  • All anti-CGRP monoclonal antibodies showed significantly higher rates of ≥ 50% and ≥ 75% MMD reduction compared to placebo.
  • NNT for a ≥ 50% MMD reduction varied from 2.7 for eptinezumab 300 mg to 6.0 for erenumab 140 mg.
  • For a ≥ 75% MMD reduction, NNT ranged from 6.0 for eptinezumab 300 mg to 16.2 for fremanezumab 675 mg/q.
  • The quarterly (CPR) for achieving a ≥ 50% reduction varied from £4647 for eptinezumab 100 mg to £7009 for erenumab 140 mg.
  • For achieving a ≥ 75% reduction, CPR ranged from £9850 for eptinezumab 100 mg to £21,862 for fremanezumab 675 mg/q.

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Key numbers

2.7
for ≥ 50% Reduction
for eptinezumab 300 mg to achieve a ≥ 50% reduction in monthly migraine days.
£4,647
Cost per ≥ 50% Responder
Cost for eptinezumab 100 mg per responder achieving ≥ 50% reduction.
6.0
for ≥ 75% Reduction
for eptinezumab 300 mg to achieve a ≥ 75% reduction in monthly migraine days.

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