Is It Advisable To Take Envas One Time In Condition Of Low BP?

My wife has been suffering Lupus Nephrities. Her Sr. creatine is 1.5 and protein urea is normal , Potassium is also normal. she is taking micophenolete(Mycept-500) since 21-12-13 and envas 7.5 mg twice daily. Now her BP is very low . Her BP is 80/60. In this stage would she take envas one time or not please comments.