Beyond what you originally asked, here's something worth keeping in mind: no matter which route you choose, running your plan through a half-life calculator is a smart move. The reason is that just like ramping up can produce surprising concentrations of the medication in your system, ramping down behaves the same way.
Take a scenario: suppose you wanted to drop from 3mg/week down to 1.5mg/week. What you'd actually do is miss your next weekly shot, then begin 1.5mg two weeks after the previous dose. Counter-intuitive as it seems, this approach gets you to your new steady state in just 1 week instead of creeping toward it across a month.
Take a scenario: suppose you wanted to drop from 3mg/week down to 1.5mg/week. What you'd actually do is miss your next weekly shot, then begin 1.5mg two weeks after the previous dose. Counter-intuitive as it seems, this approach gets you to your new steady state in just 1 week instead of creeping toward it across a month.