I used to take Celestamine whenever I am attacked by allergic rhinitis or angioedema. But this product for allergies makes me drowsy. I have to sleep it off. Then I was told by the local pharmacist that Allerta is non-drowsy. It is more expensive, about 30% more than Celestamine, but hey, if it will keep me awake for the rest of the day and stop my allergies, why not? So I bought three tablets in order to try for certain and rate its effectivity.
I usually have allergy attacks in the morning. So by 9am and it does not go away, I take medication. The first time I did, my sneezing, runny nose, and watery eyes were gone in just several minutes (I think around 20-30 minutes). But I felt drowsy and so I slept. Good thing that I just work at home so I have the flexibility of schedule. The next couple of times more that I had allergy attacks and took Allerta, I still got drowsy.
And so it is my conclusion that Allerta makes me drowsy, although it was advertised as a no-drowse drug. Anyway, I don't question its effectiveness for my allergic rhinitis, it really works. However, it has no difference with Celestamine (my original brand) except for the price. And so with that, I will settle for the cheaper option.