My doctor said that I have asthma, i was sick in January and he heard wheezing in my lungs. he gave me an inhaler which I used once at that time. I used it two days ago, 2 puffs, it s not an everyday need. I have allergies, itchy eyes runny nose etc and I would like to take Claritin for it. I m pretty sensitive to medicine. I have a 24 hour pill, 10mg. I also have sleep apnea, I m on a CPAP Machine. I worry about taking things that may make you drowsy. I would like to take it at night in case it makes me drowsy. Should I take half a pill? If I take Ibuprofen, 200 mg, would that interfere with the claritin?