The central government Monday clarified that vomiting, abdominal pain and general discomfort were sometimes reported as side effects of iron and folic acid tablets, and should not be a cause for worry.
The iron and folic acid supplementation programme has been underway in some states from last year. It was introduced in the national capital last week.
Around 200 children in Delhi, it was reported, had severe stomach ache and vomiting. Some children were admitted to hospital.
"The IFA (iron and folic acid) tablets are very safe, but there could be a miniscule number of cases where there is some discomfort," Anuradha Gupta, additional secretary and mission director, National Rural Health Mission (NRHM), said at a press conference here.
Gupta said in India, anaemia is a serious problem affecting nearly 90 percent of women.
"The IFA supplementation programme is a very serious programme and if it is derailed for some minor issues, it would be a great loss," she said.
Gupta said out of the 18 lakh children administered the IFA tablets in Delhi, only 200 reported sick.
According to studies conducted in India, 5-15 percent of people given the IFA supplementation can report side effects. "In our programme, less than 0.1 percent of people have reported side effects," she said.
Sidharth Ramji, professor of paediatrics at the Maulana Azad Medical College, Delhi, who was part of the fact-finding team for the north Delhi area where 200 children fell sick, however, said that no reason had been found for the children to have the symptoms.
"In all the schools and anganwadi centres, strict guidelines had been followed while administering the tablets," he said, adding that some children had problems from before the administration of the supplements, which were exacerbated afterwards.
He also clarified that the tablets were of fresh stock, and had been procured only in June, with an expiry date of 2015.
Apart from the incident in Delhi, children have also reportedly fallen sick in Maharashtra after taking the tablets.
Gupta said that the protocol on side effects form a part of the guidelines given to teachers and anganwadi workers who administer the tablets.
