It is common for people who used to have allergies before, and who used medications to treat allergies.
Just keep flushing.
You can eventually test the possibility of flushing more often, like every 10 or every 7 or every 5 days, to faster pass this cleansing reaction.
There are even people who have been flushing every day for 7 days to quickly cleanse the liver from the past sins and past medications. I would not recommend this, but you can do coffee enemas
between flushes to speed the cleansing process.
Cleansing process can last for weeks, cause medications may be stored all over your body tissues.