Around 180 students reportedly fell ill in Bihar and another 16 in Haryana after being administered deworming medicine on Wednesday.
The incident in Haryana occurred at the Hindu Vidyapeeth School in Sonepat, NDTV reports. Students reportedly started vomiting after taking Albendazole tablets, while some also fainted.
"I ate the medicine which ma'm gave me, and soon after I started vomiting," one of the students said.
In Bihar, as many as 100 children fell ill at the Maghra Middle School in the Biharsharif district headquarters of Nalanda, 37 children in Jamui, 36 in Sitamarhi, four in East Champaran and two in the Rohtas district, IANS reported.
The incidents occurred even as the Union Ministry of Health and Family Welfare observed National Deworming Day on Wednesday. The ministry gave deworming tablets to all government schools and Anganwadi centres for free in more than 500 districts.
According to NDTV, the drug has been approved by the World Health Organisation.