How old are you? I get that my approach is the brute-force kind, but as long as you've read up on the recognized risks, the choice to take on extra risk is yours. Take driving: everyone understands that faster speeds raise the odds of a fatal crash, we've all watched wild dash cam and body cam clips, we've looked at collision statistics, and some of us know someone killed in a traffic accident (I do), yet we still put our foot down now and then.
With that said, I'm 2 weeks in and on Monday I'll bump up to 12 mg reta; my starting dose was 4 mg on March 11th. I split it, Monday and Thursday. Every common side effect is still there, but the likelihood and intensity climb a lot, and the list covers: acute pancreatitis, lean mass wasting, metabolic shock, GI issues (bad enough to land you in hospital), acute tachycardia, arrhythmias, severe hypoglycemia, and lastly, loose skin from dropping weight quickly.
For harm reduction, keep tabs on and log your blood pressure, heart rate, hydration, and any belly pain. Bloodwork would be the gold standard, obviously, but the rest you can check at home every day. Be sure to drink enough, get electrolytes, fibre, and meet your macros, and so on.
Personally, my urine started looking darker even though my fluid intake stayed the same (~ 4 L water total, from plain water, black coffee, and protein shakes), so I nudged my electrolytes up a bit (only table salt and potassium from LOSALT, measured with a 1/8 tsp baking spoon), and it returned to pale straw.
TL;DR - If you're set on speeding through it, study every risk and how to mitigate them. Fast-tracking your titration is like speeding; you arrive sooner, but the wrecks hurt more.
Good luck!
