I didn't experience nasal stuffiness with 1.25 MG, but I did with 2.5 MG. The tired feeling comes a few hours after taking the 2.5 MG dose, so for me I don't think it was related to lack of sleep, but to something else. I checked my blood pressure when I got home and it was OK, so the tired feeling wasn't from low blood pressure. I have read that some men experience tiredness as a side effect. It definitely helped with ease and quality of erections, even at the lower dosage.I feel the same way. I think the sinus stuffiness is an issue since it interferes sleep. I also get low back aches and heartburn. Vardenafil is better but shorter half-life.
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