You should consult with an experienced local family law attorney. The attorney can review your case in detail with you, and determine whether a modification would be likely to be granted.
You say she fails to communicate however if she does not have overnight visits and they are supervised what is there to communicate about. I'm not being cruel I'm just trying to understand what is going on here. Does your restraining order allow for peaceful communication about the child? If not then she is not allowed to talk to you for any reason. Do you have specific proof that she is abusing drugs at this point in time?
These are all questions that need to be answered before an informed response can be given. You should contact an attorney in your area, many, such as myself, offer free consultations where all the facts can be laid out.
Note this answer does not constitute legal advice, and should not be relied on. Each situation is fact specific and court specific, and it is not possible to evaluate a legal problem without a comprehensive consultation and review of all the facts and court pleadings filed in the case. This answer does not create an attorney-client relationship