Some women take certain medication to delay their monthly period, especially during Ramadhan and hajj.…

Some women take certain medication to delay their monthly period, especially during Ramadhan and hajj. However, in some cases intermittent blood appears during their period time. This blood does not have the same characteristics of haydh. It is noteworthy that if they abandon taking such medication, Haydh will ensure some three days after its usual time; what is the ruling in this case?