Tapering from intramuscolar injection (Abilify)

You should shift to 15mg tablets then start your taper under the supervision of your doctor.

The following info I found on Surviving Antidepressants: Tapering injectable aripiprazole: Let it wear off, then take tablet or liquid The injectable forms are intended to last at "therapeutic" strength for a month or more, then you would get another injection to keep up the potency. Abilify Maintena 30-day injections come in 300mg and 400mg aripiprazole dosages (also see prescribing instructions and other information) Aripiprazole lauroxil (Aristada) injections come in 300mg (4 weeks), 450mg (4 weeks), 600mg (6 weeks), 724mg (8 weeks) aripiprazole dosages (also see prescribing instructions, equivalencies to tablet dosages, and other information) The blood level and side effects will be highest shortly after the injection, then wear off somewhat. Because side effects can be quite severe, a conscientious physician will prescribe the tablets first to establish your tolerance for aripiprazole. Given the very long half-life, if you have an adverse reaction to an injection, it could last a long while. To go off an injection, you must let your body gradually metabolize it. Aripiprazole's half-life is long -- about 4-7 days; a tablet dose could take about 20-35 days to completely leave your body. Since an injection is intended to last a month or more, complete clearance of aripiprazole can be up to 35 days after that period is over. For example, if you get a monthly injection of aripiprazole, it will take about 2 months or more to wear off altogether. (Since the injections come in a dosage range, if you are taking one of the higher injectable dosages, conceivably over months, to taper off, you might gradually lower the dosage of the injections to the lowest -- 300mg lasting a month -- then allow it to wear off. This requires the cooperation of a doctor.) However, even with this gradual decline of the injectable form, you still might get withdrawal symptoms. For after the injection wears off, you might consider having liquid oral aripiprazole or tablets on hand so you can take a very small daily amount to stop withdrawal symptoms, then gradually taper off that.

I know almost nothing about injections, because I refused to take them. All I am sure of that the half-life of aripiprazole is somewhat favorable and should make it easier to do jumps than on most of other meds.