Yes I'm gonna ignore the trials you're talking about. Because they're not large, well-controlled clinical trials. The trials you're talking about are weak evidence at best. If they were large trials and drugs showed benefit, then it would have been approved. The drugs you mention can cause serious side effects. Isn't Ldopa an approved drug since the 1970s? Yes I also envision a medical cure stuttering. But it should be backed by strong evidence. I'm not denying the benefits that some people can get from these drugs. I'm just saying that people need to be aware in case off label drugs, the benefits don't necessarily outweigh the risks. There's a reason they're still unapproved, off-label treatment.