I am online and happy to help you with your question today.
The safe max daily dose is 400 to 600 mg/day in divided doses. As such, the amount you are taking is considered safe
That being said, it is unusual for you to have cold symptoms so frequently over the last 3 months....it makes me think that something else is going on.
I would suggest seeing your primary care MD, or even better yet, an ENT specialist for a complete exam. This way you might be able to correct a underlying issue that may causing your recurrent symptoms.
Is there anything else you would like to discuss at this point or have all your questions been answered to your satisfaction?
I hope this information was helpful for you. But I do work for tips so I want to make sure you are happy with me before rating me. If you have another question on this or a related issue feel free to fire away. And please let me know if the rating system gives you any troubles. Thanks in advance, Dr. Rick MD FACS
what else can be the problem other that flu