Hello, influenza like symptoms (including cough) are common after the infusion. They usually start within 3 days and may last for a couple of weeks and sometimes even more. You should be examined by your doctor to exclude more serious causes like a real respiratory tract infection which may require treatment. If there s nothing to treat then you can use cough suppressants like butamirate or dextromethorphan. If the cough is not very severe, you should avoid using cough suppressants. I hopeyou find my comments helpful! You can contact me again, if you d like any clarifications or further information. Kind Regards!