Question: What are the treatments for Glossopharyngeal Neuralgia ?
Answer: Most doctors will attempt to treat the pain first with drugs. Some individuals respond well to anticonvulsant drugs, such as carbamazepine and gabapentin. Surgical options, including nerve resection, tractotomy, or microvascular decompression, should be considered when individuals either dont respond to, or stop responding to, drug therapy. Surgery is usually successful at ending the cycles of pain, although there may be some sensory loss in the mouth, throat, or tongue.
Source: NINDS

Question: what research (or clinical trials) is being done for Glossopharyngeal Neuralgia ?
Answer: The National Institute of Neurological Disorders and Stroke (NINDS) and other institutes at the National Institutes of Health conduct research related to GN and support additional research through grants to major research institutions across the country. Much of this research focuses on finding better ways to prevent, treat, and ultimately cure disorders such as GN.
Source: NINDS