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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%)