NYC IV Therapy provides Ketamine infusions in our Manhattan medical clinic to provide relief from conditions or illnesses that are causing pain, and compromising your ability to enjoy life. IV ketamine therapy is a form of chronic pain management that is able to directly target the pain at its source. Many patients report feeling that their pain has greatly diminished as soon as the infusion is completed. The pain relief can last for quite some time, with some individuals experiencing relief for up to several weeks. Ketamine infusions can be an effective way to treat Complex Regional Pain Syndrome, as.