Method Adding Metoprolol to SN Regime

[LonelyCarioca]

Apologies if this has been addressed somewhere in the SN megathread, still combing through it. I have access to metoprolol through a family member and I saw another post suggesting that adding propranolol (both beta blockers) to the SN regime can slow the heart and theoretically bring unconsciousness faster. Looking at the effects, it also reduces migraines which is an added bonus because of the headache SN can cause. I don't know much about either of these beta blockers so I wanted to see if anyone could offer some insight. Would using metoprolol work and how much should be taken? At what point during the 48 hour metoclopramide regime should it be taken? My guess is as a stat dose, but I'm paranoid about messing something up.