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Table 3 Adverse effects reported during the 3-month treatment period. Some patients experienced multiple adverse effects. Other captures adverse effects reported by only a single patient, these included bloating, cold extremities, diarrhoea, joint pain, low mood, restless legs, weight gain, tremor and tachycardia

From: Efficacy of erenumab and factors predicting response after 3 months in treatment resistant chronic migraine: a clinical service evaluation

Adverse effect

Number reporting

Constipation

27 (26%)

Injection site reactions

4 (4%)

Dizziness/lightheadedness

3 (3%)

Hair loss

3 (3%)

Itch

3 (3%)

Rash

3 (3%)

Fatigue

2 (2%)

Muscle cramps

2 (2%)

Nausea

2 (2%)

Other

9 (9%)