The effect of Botox and Dysport injections is not immediate. You will start to notice the effects of Dysport injections about 3-5 days after treatment, and the full effects after 2 weeks. 2 weeks after your treatment you will return to the office for a follow up appointment where we will assess the outcome together. The effects of Botox and Dysport injections usually last 3-5 months, depending on the amount used and individual response.