|Short description Overview   Diethylcarbamazine is a drug used to treat certain worm infections. The drug works by killing the worms. It is prescribed to treat Loiasis, Bancroft&rsquos filariasis, Eosionophilic lung and river blindness. This drug will not work in the treatment of other worm infections such as tapeworms or pinworms. It is available only with a prescription from a doctor.   Diethylcarbamazine is ingested orally as a tablet.