Injection Therapy for Headache and Facial Pain

Injection therapy for peripheral nerve blockade is an increasingly viable treatment option for selected groups of patients with headache and facial pain that are refractory to medical therapy. Despite the variety of acute and prophylactic pain-relieving medications that are often efficacious for headache and facial pain disorders, certain patients experience intolerable side effects to these agents. In others, the remaining pharmaceutical approaches may be too hazardous as a result of comorbid f

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