How long until botox shots take effect for cervical dystonia?

About five days : Botox takes about 4-5 days to cause muscle relaxation in most areas. That's why most clinicins will have you return in two weeks to reevaluate treatment. Dosing can vary based on the muscle size and you would rather under treat than over treat.

Takes 2-3 Weeks: Generally to see effects of botox the first time. Sometimes adjustments to the dose are needed on followup injections in 3 months to place more or less medicine in one place vs another. Speak with your doctor on the follow-up injection in 3 months to discuss any changes needed.