In order to achieve the longer and fuller lashes you want, you must keep using latisse regularly. Users can expect to experience longer, fuller and darker eyelashes in as little as. How Long Does Latisse Take To Work Attention-grabbing Thought Processes I am waiting for it to get sent to me in the mail. How long does latisse work . However, you could see visible results with as little as 2 months of regular use. In order to see full results from latisse, you must be diligent in applying it nightly. It isn’t fully understood how latisse lengthens, thickens and darkens eyelashes. Latisse does not provide instant results. How long has it taken to work for everyone else? If you stop using the product, your lashes will return to how they appeared before you started using the product. How long does it take for latisse to work? With regular applications along the lash line of the upper eyelid, latisse gradually encourages growth of longer, thicker and darker eyelashes. L...