My Sister, i will give you concrete answer with prove on how to help your friend but take it serious because you won't get it again and don't let evil once here or out there to deceive you wrongly because many are here to give you wrong advice or to be against my advice to you right now which i don't care but to testify the goodness of the Lord.
Tell your friend that the only way she will be free is through God's spiritual healing and let her visit SYNAGOGUE Church of all Nations there in Nigeria because i have witnessed many of them that came with such cases above the age of your friend and they got healed instantly, which they later came back to testify the glory of God. This is not issue of meeting with the Doctors, this is spiritual attack and spiritual attack is beyond Doctor's treatment and only way is God's healing. So let her visit there or get the Anointing water from them for prayer and you will see that her life will change completely for the glory of God. Watch the YOUTUBE Videos below for more encouragement and many more on youtube if you want further prove.