- Sexually active women of child-bearing potential must agree to use two forms of contraception (hormonal and barrier method of birth control or abstinence) prior to study entry and for the duration of study participation; males should use barrier contraception or abstinence during the study; use of contraception or abstinence should continue for a minimum of 1 month after completion of the study; should a woman become pregnant or suspect she is pregnant while participating in this study, she should discontinue the study drug and inform her treating physician immediately; a pregnancy test is required prior to study enrollment and monthly while on treatment with 1-MT for all women of child-bearing potential; also men should be discouraged from fathering children while on treatment