Hi, I had gone through your query and understood your concerns.
Telekast F contains Montelukast
Sodium which is a good choice for allergic condition like yours.
Mild abdominal pain
is one the side effects for the drug. And so if it is tolerable and mild continue with the drug. If not tolerable then you may take Alerid 10mg. one tablet daily for 3 days.
Hope this guides you. Thank you.