Of an opposite class to diuretics are the remedies which suppress excess of function, and relieve the kidneys of pain and pressure by withdrawing blood from them and lessening the volume and rapidity of the circulation within them. When the kidneys are excited from any cause, the human practitioner is able to afford them direct and immediate relief by causing a free action of the skin. In order to "soothe the kidneys" the veterinary practitioner has to resort to large and frequently renewed cataplasms, and with these he incorporates emollients and sedatives, as belladonna extract, opium, or poppy-head infusions, hyoscyamus, hops, chamomile flowers, and possibly soft-boiled turnips or other "roots", as they are commonly called. To these measures he adds the frequent use of enemas of warm water and belladonna extract with glycerine. A very soothing effect is often apparent from this mode of internal "fomentation" when the precaution is taken by a good nurse to use the fluid at a correct temperature and cause it to be retained by holding the tail down. (See Administration of Medicines.)