How long would invega sustenna take to get out of the system if used since august 2020 up until end of august 2022? 2 years of usage . to get back to normal and stop adverse effects ?

This will depend on how your body metabolizes it and any other meds you take as well. Go to Drugs.com and look the specific make you have been using and see if they have this information on people like you: age, gender, ethnicity, diseases being treated and other meds to avoid at the same time. Read infor Pharm has given you. Stopping it suddenly can be dangerous. Read the Black Box warning.

It could take more than 3 months before the medication's effects and/or adverse effects are over (the median elimination half-life after single dose administration of 39 to 234 mg intramuscularly ranges from 25 days to 49 days).