How long do Botox injections for blepharospasm last?
Botox injections start taking effect within a few days and can last 2 to 3 months. After multiple Botox injections, the affected muscles may waste away. Symptoms of benign essential blepharospasm may resolve to the point where you no longer need Botox.
Botox injections are effective in about 70% of people with blepharospasm.