Another adult who has been taking it for a long time and recommending it.
Had very poorly controlled asthma years ago. Combination of montelukast, antihistamine and fostair daily (ventolin sometimes) has enabled me to have a normal, active life.
I did find it disturbed my sleep when taking it at night, so take it in the morning.
Originally I thought it made me feel depressed (one potential side effect) but then realised that I feel low when my asthma is not controlled - that finding it harder to breathe affects my mood, not the meds!
I had read about the impact on children. I think you need to consider the impact of taking montelukast on you as an adult.
The crucial question is - would it benefit your life? If you can’t do things because of your asthma, then it is worth trying it for a proper length of time. I can now do sport with no side effects. A decade ago I could not do, or risk, much sport at all. The asthma clinic told me years ago that asthma should not stop me from doing things; if it did, then it wasn’t well managed enough yet. If you already lead a normal active life and you feel your asthma is well controlled, then maybe you don’t need it. (Depends if the nosebleeds are seasonal or permanent, if they are serious, if they are impacting your life and you really do feel fostair is the reason.......)
As a side comment, because I do believe montelukast has really helped me, and am not trying to derail the thread and introduce covid for no reason 😉, I also did end up with covid - our worst fear, and happened even after I had been exceptionally cautious. I got through and didn’t need additional medical care bar talking to my GP on the phone. (As an asthmatic, make sure you have an oximeter and good thermometer at home - you need to use constantly). Under GP instructions, I had to use both inhalers non stop for a while. But I recovered 😀