Invega Sustenna (intramuscular injection) has a long half life range of 25 to 49 days. This is the time it takes for plasma levels to reduced by half, then in the next 25 to 49 days the plasma levels are reduced again by half and it continues.
It roughly takes around 5 to 6 half lives for a drug to be eliminated from your system to the point it is clinically no longer noticeable.
Using this calculation, as a guide, after your last dose, you could expect it to take anywhere between 150 to 300 days to be cleared from your system. Factors that cause personal variation include age, health, weight, metabolism and other medical factors.
I know you are suffering as I have too, but it will be alright. my symptoms have lessened and its been eight months and I guess it depends on how your body eliminates foreign chemicals in your body. I have hope that I will eventually be able to sleep until 7am instead of 5am and take day naps. Just hang in there!!! and don't stress.
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