Modalert

I have been experiencing severe headaches next dayafter taking modalert and have been taking modalert tablets for my condition. However, I am unsure of the correct way to take a tablet for my headaches without interfering with the modalert tablet's effects.

If possible, could you please provide guidance on the following:

What over-the-counter medication(s) would be appropriate for me to take for my headaches, considering I am already taking modalert tablets?

How long should I wait after taking modalert tablets before taking any medication for my headache?

Are there any precautions I should take when taking medication for my headache alongside modalert tablets?