Hi chance, and welcome in! -
Sorry to hear your diagnosis- and then med-switch is making you feel dead. Don't know how it's possible to feel alive on fluoxetine/Prozac ;-), but going on duloxetine/Cymbalta can cause quite some problems for some. Some get used to it and get help from it for depression and pain, others don't. Zombification, if that's what you mean by "feeling dead", is what I got from amitriptyline and also some supps.
Cymbalta may be one of the best bets if you have depression and fibro pain (not a good bet, but there isn't much that works for fibro med-wise).
What I'm wondering is if the problem is caused by weaning off and in at the same time too quickly. May have seemed clever, but if it's not working for you, I'd say your doc needs to know immediately and change the strategy - going slower or trying something else.
Cymbalta isn't an MAO-inhibitor, that'd need 5+ weeks between the two, but looking at how you're sposed to switch from fluoxetine to duloxetine nps.org.au says "taper and stop fluoxetine, wait 7 days for washout, then start SNRI at low dose†§"
† = Fluoxetine may still cause interactions 5 or 6 weeks after cessation (especially from higher doses) due to long half‑life of drug and active metabolite.
§ = Co‑prescription of the two antidepressants in this instance is not recommended
Also: "All switches from one antidepressant to another may result in serious complications. Switches must be undertaken cautiously and under close observation."
Now I wouldn't ever
say your doc seems to be making a mistake, but get back to them immediately!!
Generally, sunkacola's General Advice Post
here is great for starters. Also
@sunkacola can give you great advice about coping with depression.
I'm also wondering if you mean you've stopped B12, altho are continuing with other supps?
Maybe you'd like to swap ideas on supps.