Since I had a bunch of 60mg capsules and didn't want to pay for a whole new 20mg script, I decided to use a milligram scale to help me along.
I purchased a milligram scale from ebay (I think the brand is j-scale and the model is JS-VG) for under $50. I've attached a picture of the one I've got.
I dumped out the contents/beads of a 60mg Cymbalta capsule and I determined that the 60mg capsules all contained ~210mg of beads.
I did the math and figured out:
20mg=70mg of beads, therefore, 1mg of active drug=3.5mg of beads
I would weigh out 70mg of beads and fill capsules I bought at the healthfood store which gave me 90 (20mg dosage capsules, weighing 70mg of beads each).
Now that I have decided to come off Cymbalta, I will do the same, but in reverse.
My plan is to reduce my dosage by 1mg daily until I get down to 0.
I hope this is helpful to you.. I know it made life a LOT easier than counting beads, which I ended up spilling all the time.