Child 1 Yr 5 Months Old Is Feared To Have

Child 1 yr 5 months old is feared to have taken thyronorm tablet. Not sure. She was found with thyronorm bottle opened in her hand with tablets spread over. We are doubting that she may have consumed it since she appears to be some what unwell. She is having some constipation, not eating well (Takes only milk now.). Can you advice if there is any thing to worry.