The book 'Venomous Snakes of Africa' by Spawls and Branch has quite a bit of info on these attractive little snakes, without the book to hand I can't say a lot else except the clinical evidence I saw presented *seemed* to sugest that they're not medically significant - bites caused primarily localised swelling. However their small size and reclusive nature probably means bite data is limited due to few cases. I do remember one case of a bite to a woman (on the heal) that caused death in ca. 15mins, though it is probably safe to assume that this was through anaphylaxis and not primary toxicity. Still a fatality though. Check that book for full info. Cheers, Lee.