Anyone ever had shock treatment therapy?

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My father has undergone this 3 times. It helped the first 2 times, the last time though, it seemed to really mess him up. His short/long term memory has basically been destroyed. His molars have been crushed. He shakes alot and sometimes kinda just stares into space. He received these treatments because of his depression. He was aware of these side effects when he had this done. He freely signed the release forms. He said he feels like when the medicine gets used to his system he needs something to get the chemical imbalance back into balance. Is this barbaric to anyone else or is it just me?