Provided that Fibro-Vein is injected correctly at the appropriate concentration then the only likely adverse reactions are pigmentation and thrombophlebitis
Pigmentation is caused by haemosiderin staining of the dermis and looks like bruising over or around the treated blood vessel. The incidence is low and usually resolves over 12-18 months.
Mild thrombophlebitis is not uncommon after sclerotherapy and is due to trapped blood in the vein. It is usually localised and self limiting and easily aspirated at the follow up.
Occasionally people may be allergic to the product and reactions are usually mild but may result in anaphylactic shock.
Necrosis and ulceration should be very rare and are caused by injecting outside the vein or from using too high a concentration.
Information about adverse event reporting in the UK can be found at www.yellowcard.gov.uk. Adverse events should also be reported to the Pharmacovigilance Department at STD Pharmaceutical Products Ltd.