1 One drug, TGN1412, was tested on animals and in humans. 2  All the human patients suffered life-threatening side-effects which didn't appear in animals. 3  Not all drugs are used for the original purpose they were designed for. 4  Animal testing can't show all the potential uses of a drug.erhaps the law could be changed so that animal testing was optional, rather than compulsory. Scientists could decide not to test drugs on animals if they knew that it was safe to do so. We would need alternatives to animal testing, which could safely test drugs without harmful consequences for humans.
The feeling of itching urges one to scratch the site which causes more irritation and itching. Thus it goes as a cyclic reaction making one to itch more vigorously. Itchy legs can cause common symptoms like irritation of the skin in the legs, redness, pain and formation of red lesions on the legs. In severe case it may cause bleeding of skin due to repeated scratching. Itching can cause pain and discomfort feeling.
Use of hot showers and excessive use of soaps that can cause skin dryness can result in getting itchy rashes on your legs. It may also be due to skin diseases like dermatitis, blood diseases and psychological reasons. In this case, red bumps with occasional white and black heads may appear on thighs or buttocks region.he release of histamine from cells in the epidermis of skin is usually considered to cause itchy sensations. Though strangely pleasurable, scratching can damage the skin only to make it further itchier. The most common symptoms of itchy legs are redness, bumps, spots or blisters and the worst of them all, skin dryness.