<prompt> Dose of centchroman is -30 mg60 mg120 mg240 mg  <response>: Ans. is a i.e., 30 mg Cetchroman Sahelio Ormeloxifene, research product of Central Drug Research Institute, Lucknow, India.o It is a potent non - steroidal compound with potent anti - estrogenic and weak estrogenic properties. It is taken orally 30 mg twice a wreek for first three months then once a wreek.o It works primarily by preventing implantation of fertilized ovum. It does not inhibit ovulation,o It is avoided in PCOD, writh liver and kidney diseases and in tuberculosis. There may be a tendency of oligomenorrhoea.o The failure rate is 1 - 4100 woman years of use. Failure rate is less with increased doses. It is devoid of any significant adverse metabolic effect.o This may also be used as a emergency contraceptive. 