Thanks for your query
The symptoms that you have described can be due to a mild allergy
to the medicine. It can also be local triggering of cough
reflexes caused by ingestion of the tablet. Since it is causing discomfort and pain in abdomen, it is good to take cough suppressant syrup before taking the thyronorm
tablet. You can also try a mild anti-allergic medicine. Another trick that may work is taking the mind off the cough by doing some walking and stretching.
It is always good to get the excessive cough symptoms evaluated by a physician, who may recommend some investigations to rule out concurrent infections.
Hope I addressed your concerns.