Question: What are the treatments for Neurosyphilis ?
Answer: Penicillin, an antibiotic, is used to treat syphilis. Individuals with neurosyphilis can be treated with penicillin given by vein, or by daily intramuscular injections for 10 14 days. If they are treated with daily penicillin injections, individuals must also take probenecid by mouth four times a day. Some medical professionals recommend another antibiotic called ceftriaxone for neurosyphilis treatment. This drug is usually given daily by vein, but it can also be given by intramuscular injection. Individuals who receive ceftriaxone are also treated for 10 - 14 days. People with HIV/AIDS who get treated for neurosyphilis may have different outcomes than individuals without HIV/AIDS.
Source: NINDS

Question: What is the outlook for Neurosyphilis ?
Answer: Prognosis can change based on the type of neurosyphilis and how early in the course of the disease people with neurosyphilis get diagnosed and treated. Individuals with asymptomatic neurosyphilis or meningeal neurosyphilis usually return to normal health. People with meningovascular syphilis, general paresis, or tabes dorsalis usually do not return to normal health, although they may get much better. Individuals who receive treatment many years after they have been infected have a worse prognosis. Treatment outcome is different for every person.
Source: NINDS

Question: what research (or clinical trials) is being done for Neurosyphilis ?
Answer: The National Institute of Neurological Disorders and Stroke supports and conducts research on neurodegenerative disorders, such as neurosyphilis, in an effort to find ways to prevent, treat, and ultimately cure these disorders.
Source: NINDS