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.
A leg rash is an inflammatory reaction of the skin on the legs that may extend to the feet. Leg rashes can be caused by a wide variety of mild to serious diseases, disorders and conditions. Leg rashes can affect a small to large area of one or both legs and can occur in all age groups and populations.eg rashes may or may not be itchy and can be red, white, purple or silver in color. The texture of a leg rash can be flat, raised, bumpy or scaly and include flaking off or peeling of skin cells. Leg rashes can also appear as dots or spots or occur over a large, solid continuous area.