i just took my 3rd dose of reta (2mg week 1, 3mg week 2, 4mg week 3). i was split dosing tirz 7.5mg 2x a week before. i ended up stopping cold turkey a week before starting reta. definitely felt the hunger come back but besides that all has been good. haven't gained/lost any weight in the meantime, just a stall while i ramp up which i consider fine and okay since reta by all accounts is very powerful especially early on.
i have cheated the initial titration schedule a bit though by starting at the bottom and going up 1mg a week. i think i might stay at 4mg for a few weeks before bumping up to 5mg or 6mg next.