Hello,
Hetrazan is Diethylcarbamazine (DEC) used to treat Filariasis and some protozoal infections. Unless your Eosinophilia is due to Filariasis this medication is NOT indicated/used for you.
Eosinophilia is not a disease. It just means the Eosinophils cells have slightly gone up in number response to allergy, infection etc. An allergic cough can cause this. You can do a retest and this should be normalised by now. Unless you get it confirmed that from your Doctor that you have Filariasis or any other protozoal infection you need not take Hetrazan.
Hope this helps
Please feel free to ask followup question.
Thank you