The French polidocanol study on long-term side effects: a survey covering 3,357 patient years.

Background: AIMS Short- and mid-term side effects of sclerotherapy, in particular with polidocanol (lauromacrogol 400), have been previously described in our registry of 12,173 sessions. The objective of this follow-up registry was to evaluate the long-term incidence of adverse events with polidocanol.
Methods: The physicians involved in the initial French registry were contacted and asked to partake in the follow-up survey. Initially included patients were controlled at the latest possible date to determine whether a complication had occurred after the end of the initial survey.
Results: Data on 1,605 patients included in the French registry were reviewed with a maximum follow-up of 60 months, covering 3,357 patient years. Five (0.4%) adverse events were observed in patients treated with liquid polidocanol and 46 (1.1%) in patients treated with polidocanol foam. The most frequent side effects were visual disturbances (n=14), and the most severe were muscular vein thrombosis (n=8). The onset of side effects was mostly observed directly after sclerotherapy or in the 6 months after (84% in the first year). One deep vein thrombosis recurrence occurred in a patient with heterozygote Factor V Leiden after stopping anticoagulant treatment (foam sclerotherapy).
Conclusions: Foam sclerotherapy is a recognized reference method in the treatment of varicose veins of all types. This study demonstrates that polidocanol is a safe sclerosing agent in the short and long term.