Weight and DXM dosage

So I guess I haven't really been scientific much about my dxm dosing. I used to weigh only like 150lbs and would get so fucked on the dxm I would dose in a good way.

After reading more about dxm I see that more weight requires more drug to get influenced. Since im up to 245lbs now-a-days

Dosages for each plateau are nearly double than previously meaning double the cost really. I never really thought of it but it sucks that way, motivation to be a smaller person.

For example at 150lbs 3rd plateau would require 639mg DXM HBR while at my 245lbs weight requires 1043mg DXM.

2nd plateau: 435mg (150lbs) and 710mg (245lbs)

Does anyone have anything to add regarding dxm and weight? waiting on my dxm in the mail(19bottles of gels 5.7g) but with this new info its like $10 per high and 3 bottles of gels cause im so fat.