Headaches with Clen

I started taking Clen a few days ago and I was wondering if it was ok to take Advil or and painkiller whie on it. Because I started to get very intense headaches. Is taking them while on clen bad for me? Or would they cancel out the effects of it?
Thanks

I believe it could be a blood pressure issue. Perhaps some Celery Seed extract or some Hawthorn Berry would help you out. But if you have a headache some advil will not do any harm.