How long will 1-2 units of Botox last on each DAO?

Botox and other neuromodulator injections lasts 3-4 months on average, regardless of the site of injection or amount injected. Everyone is different so the overall range can be as short as 8 weeks to over 6 months. The good thing is that the duration is typically the same for different sites for each individual, so you can schedule your injections at regular intervals. I recommend seeing a trained injector who keeps careful records of your injections including the dates, location, and dose. Even with the most commonly performed cosmetic procedure, first or 20th injection, it's important to make safety a priority.  

Botox will last usually 3-4 months and is not dependent on dose. if you received a good result then that dose was proper and you should expect this length of time