Product Name: Restylane Specification: Restylane II and Restylane III Duration and recovery time Duration depends on factors like the individuals skin type, lifestyle and age. After the initial treatment, follow-up sessions are normally recommended around every 6 to 12 months depending on the individual and the treatment. A treatment of the lips lasts less than 6 months. Treatments have a recovery time of 2 to 3 days.