1, works well for about 20 hours, last 4 hours a bit challenge
2, I also have sinus, but allergy+sinus only has regular strength (5mg), why not have EXTRA STRENGTH ALLERGY+SINUS pills?
3, does this pill suitable for long term use? ie: daily dose for 3 months at a time?
4, is there a usable coupon? the printable coupon on the company website has an expired date......
Yes, I'd recommend this product