Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
pill [pɪl] n табле́тка#
the pill (contraceptive) противозача́точные pl adj (табле́тки)
to be on the pill принима́ть (impf) противозача́точные табле́тки
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.