The effects of Botox generally last 3 to 4 months, though individual longevity can vary based on metabolism, dosage

https://blogfreely.net/botwinzorv/how-soon-does-botox-work-onset-and-peak-results-explained

The effects of Botox generally last 3 to 4 months, though individual longevity can vary based on metabolism, dosage, and treatment area.