I couldn't take any of them! Pregabalin, gaba, whatever.
Cymbalta made me deathly ill! My pharmacist says these are drugs that either your body likes them or doesn't, no real in-between....... so I agree, if it doesn't make you better, quit it!
Now, part of my issue with medications is I'm allergic to the synthetic fillers. If I try a new med, it has to be a brand name that doesn't have some cheap filler in it.
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Your conscious mind may not be able to understand what I'm telling you, but I trust your unconscious mind to use that part that is most relevant.