I've been on Cozaar for about a week and have a lot of sinus congestion. I'm trying to put up with it, but had a hard time sleeping last night. I take singulair and nasalcort for allergies/sinus problems. I'm wondering if (hopefully) this symptom will pass? Are any of the other ARB's better for people with sinus/allergy problems? Avapro gave me a bad cough, and I had trouble sleeping with Diovan. I'm determined to try to stay in the ARB class because I think (for me) they're the best drug if I could just find one with tolerable side effects.