The anaesthetic potential of menthol was evaluated in lambari Astyanax altiparanae by exposing fingerlings to concentrations 50, 100, 150, 200, 250 and 300 mg L À1 and measuring the induction and recovery times to deep anaesthesia, the mortality rates during and 96 h after procedure and after 6 min of continuous exposure. The effect of menthol on stress responses were evaluated by comparing glucose and cortisol levels of juveniles subjected to anaesthesia (50 mg L À1 ), stress (air exposure) or pre-anaesthesia associated to stress. All concentrations induced deep anaesthesia within 0.5 to 1 min, with recovery between 1.83 and 4.16 min, without mortality during the induction or up to 96 h after exposure. Induction time decreased and recovery time increased linearly as the menthol concentration increased. Continuous exposure to 50, 100 and 150 mg L À1 concentrations resulted in mortality rates of 0%, 20% and 80% respectively. Anaesthesia or air exposure increase blood glucose but prior anaesthesia with menthol suppressed the elevation of cortisol caused by stress. Menthol has an anaesthetic effect and attenuates the stress response in lambari and 50 mg L À1 is the most effective concentration for inducing deep anaesthesia in 1.0 min, safe for up to 6 min exposure.
RESUMO -Diversas dermatopatias de gatos tem importância na rotina da clínica médica veterinária. Muitas destas apresentam-se de forma crônica, e os proprietários dos gatos acometidos geralmente recorrem a médicos veterinários que prescrevem tratamentos alopáticos na tentativa de resolver sinais clínicos evidentes na maioria dessas condições, como prurido, alopecia e descamação. A homeopatia muitas vezes surge como última alternativa para estes proprietários, que diante do insucesso frequente da terapia com antimicrobianos, pomadas e até corticoides resolvem experimentar tratamento diferente. Há anos o uso de medicamentos homeopáticos tem sido descrito para dermatopatias em animais de companhia, e o sucesso foi experimentado na grande maioria dos casos. A presente revisão bibliográfica tem por objetivo a reunião de informações acerca do histórico da homeopatia como tratamento de dermatopatias de gatos diversas, abordando tanto os medicamentos receitados quanto as doenças tratadas e o sucesso relatado. Palavras-Chave: Homeopatia, Felinos, Dermatologia.ABSTRACT -Several dermatopathies are important in the veterinary clinic routine. Many of them appear as chronic conditions, and the owners of the affected cats usually resort to veterinarians who prescribe allopathic treatments trying to reduce evident clinical signs as itch, alopecia and peeling. Homeopathy generally arises as the last alternative to these owners, who decide to experience a different therapy after frequent failures treating with antimicrobians, ointments and even corticoids. The use of homeopathic remedies in pet dermatopathies has been described for years, and in most cases success has been related. This review aims the gathering of information about the history of homeopathy as treatment of various dermatopathies of cats, approaching both the medicine prescribed and the skin diseases treated, as well as the success margin described.
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