A Prospective Study of the Long-Term Efficacy of Two Different Venoactive Drugs in Patients with Post-Thrombotic Syndrome

Objective:In an open cross-over study, the effect of two different venoactive drugs was prospectively studied in a series of patients with post-thrombotic syndrome.Design:Prospective, open cross-over study.Patients:Twenty-nine patients with established unilateral deep venous insufficiency of at least 12 months duration, and a history of venography-proven deep venous thrombosis in the affected leg.Interventions:On entering the study, patients were randomly assigned to receive either Hidrosmina (Venosmil, FAES SA, Spain) 600 mg daily, or 0-(β-hydroxyethyl)-rutosides (Venoruton, Zyma SA, Switzerland) 900 mg daily. The drugs were taken for 6 months. At the end of this period, the drug was discontinued, and patients taking Hidrosmina changed to rutosides, or vice versa, for a further 6-month period. Finally, both drugs were discontinued, and patients were re-examined 3 and 6 months later.Results:During the first 6-month period, 12 out of 29 patients showed reduced tiredness and/or pain in the leg in comparison...