Need help with math

Since my crash in the fall, I can no longer do liquid. I’m trying to wrap my head around the math of a daily dry cut taper  I have a total of 4 mg. I want to taper a 2 mg pill. I need to go super slow at 160 days Per mg or 320 days for 2 mg. The pill weight average is .172. What is the equation for daily cut rate? What is equation for % per month reduction at this rate?

I think these are right.  A smart person would double-check.

 

First Order taper equation:  =0.344*EXP(DAY*-0.002166085)

 

0.344 is your starting dose (weight of two pills).

DAY is the day number of your taper (0, 1, 2, 3, ...)

-0.002166085 is a constant (for the first-order taper) based on your desire to cut half of your dose in 320 days.

 

 

Linear taper equation:  =0.344-(0.0005375*DAY)

 

0.344 is your starting dose (weight of two pills).

DAY is the day number of your taper

0.0005375 is a constant (for the linear taper) based on your desire to cut half of your dose in 320 days.