Morning all hope your'e all well, well ive been on the Montelukast for over 2 weeks now, slight improvement in the asthma its definitely helped the constant cough tho i still have it but not as bad. my main concern is tiredness, im usually an insomniac but on monte its almost knocking me out. i hate the feeling of not being in control and as i drive a lot im finding it hard also my partner works away from home some nights and god forbid if anything was to happen i wouldnt hear a thing. and woke this morning after a good 9hour sleep still feeling half asleep. I stopped taking other meds for same reason, where do i go next? anyone else had side effect from monte.