Sean Spencer was ready to give up. For two years, since suffering a major panic attack, the entrepreneur had been living under a cloud of depression. Nothing seemed to make it better. He took traditional antidepressants, but they made him “want to die.” Meditation gave him a fleeting sense of relief, but it wasn’t enough to get him through the day. Out of desperation, he finally traveled to a clinic to try a controversial new therapy: ketamine IV infusions.

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