Thanks for posting your query.
500 is prescribed for the treatment of chronic hemorrhoidal disease and reducing the frequency and severity of acute hemorrhoidal attacks. It is usually given for a period of 4 to 6 weeks.
Usually the side effects are not severe enough to warrant the discontinuation of the drug.
If the symptoms of nausea
, headache and rashes are severe it would be best for you to be seen by your treating physician who can assess and if required change your medication.