Suggest remedies for vomiting while on Simethicone
As discussed in details below.
Thanks for query and an elucidate history.
Read the history carefully and understood your concern.
Now the problem is two-faceted.
Colace is used as a stool softener which you will have to take but is causing nausea and you are taking Metamusil which is fiber supplement again helping in normal and smooth evacuation.
You are also taking Simethicone several times; may cause constipation. It may - means it is not sure whether it will cause constipation in your case or not.
So stop worrying as you are already taking 2 things to keep stool soft and hopefully you will not be constipated
Continue as it is.
Continue taking Sitz bath.
I hope this answers your query, please feel free to ask for further relevant queries if you feel that there is a gap of communication.