Hi, I don't stutter, but I have tried different anti-anxiety medications. If they are making you foggy, that is a side effect. They should not make you foggy. Sometimes this is a beginning effect; sometimes it never goes away. Ideally, an anti-anxiety medication, of whatever sort (you seem to know the different categories of drugs that can be tried for anxiety?), should make things easier, not harder, including studying and performing detailed, complex tasks. From what I've read anecdotally, the effect of anti-anxiety agents on speech varies. But I have noticed that *if* the drug actually does have an anti-anxiety effect, it is likely to help at least somewhat with speech. The effect can be literally -- more fluent speech -- or less anxiety about stuttering, or both. Sometimes it's hard to say what the difference is, but I imagine if you feel better about speaking in general, that's what matters, yes? But it's a crap shoot with these medications, both the ones that really should only be used short term or for acute situations because they are addictive ( the benzodiazepines), or the one prescribed for more long term use, the anti-depressants anti-psychotics that are also used for anxiety. Personally, I have had poor luck with long term help with severe anxiety thru medications and have had to go way outside the mainstream to try to find help. But I am an outlier in many ways...yay me. If you search thru this sub, you'll see a variety of experiences as far as these drugs helping with speech. It's hard, though, to know what to think. Anecdotal evidence is persuasive, but can't tell you how *you* will be affected. Statistics also cannot predict the reaction of any individual. Also....beware of other, less-talked about effects of some of these drugs, decreased sex drive, for example. Tho, there are a couple of anti-depressants that happened to be used on anxiety too that are known to cause little or no sexual side effects. Wellbutrin is the most well know, I think?