After some searching, I managed to find some relatively recent anecdotes. As a disclaimer, I want to make clear right away that I'm not aware of any medical records or other kinds of supportive evidence for these testimonies. I'm just sharing what these individuals claim to have experienced, and each one is free to either take their word for it or remain skeptic.
1) God Helped Me Escape Insane Asylum! | Gary Whetstone
Very briefly, the story goes as follows: Gary was a successful and high-achieving student up until ninth grade, where he had a terrible car accident that severely impaired his physical health and destroyed all his sport-related dreams. He turned to drugs and hanging out with drug addict friends as an escape, his mental health heavily deteriorated, he began to hear voices and eventually broke into a house and tried to assault a woman and his husband. He was sent to an insane asylum, got locked up in an isolation ward, was about to be subjected to an experimental lobotomy type surgery that had always resulted in the patient's death, when suddenly a pastor visited him, prayed for him, the power of God fell over him, he totally recovered his mental sanity, and God's voice even guided him out of the isolation ward and the mental institution (sort of like Paul leaving the jail). There are many more details, and I highly encourage the reader to watch the full testimony.
2) Anointed Candy Bar Deliverance Case – R W Schambach
The video's description has a very eloquent summary:
Testimony starts at 2 min mark on the video. Anointed candy bar delivers woman who had been in an insane asylum for 30 years. Acts 19:11-12 states: “ And God wrought special miracles by the hands of Paul: So that from his body were brought unto the sick handkerchiefs or aprons, and the diseases departed from them, and the evil spirits went out of them.”
3) Insane Asylum (True Story)- B.H. Clendennen
Summary: a 76 year old woman approached Bertrand H. Clendennen and told him that God had told her that he was the one to pray for his husband to get healed. The catch: her husband had been in an insane asylum for years, with severe loss of memory (probably Alzheimer), couldn't even sit down on his own, etc. Bertrand visited the man, prayed for him and left. Very soon they receive the news: the 76 year old woman's husband is completely healed and on his way to meet them (he left the insane asylum).