Confusing wording in the lead paragraphs

edit

"Women taking isotretinoin must not get pregnant during and for 1 month after the discontinuation of isotretinoin therapy."

So, is it the case that a woman taking the medication must not get pregnant during the discontinuation of the therapy plus up to one (see MOS for numbers, BTW) month after said discontinuation process has been completed? Or, is it instead the case that she must not get pregnant during the therapy and up to one month after the discontinuation of the therapy? The way this sentence is currently worded is vague enough to cause significant confusion as to this restriction. Furthermore, none of the remaining sentences in the paragraph serve to elucidate the issue further, so I'm asking for someone with relevant knowledge to reword the sentence in such a way that eliminates this possible source of confusion.