Is it safe to take 2 advils (ibuprofen) , i have a bad headache going on 2 days now. i take klonopin half of .05mg twice a day.

May not be enough: each advil (ibuprofen) pill is 200 mg, an average adult need 600 mg or 3 pills, an overweight person may need 800 mg (4 pills)

Yes it is safe: advil tablet contain 200mg of ibuprofen you can safely take 3-4 tablets every 6-8 hours per day so it is safe to take 3-4 tablets of Advil for headache same time if headache does not get better in 24 hours go and see a doctor