Not in the amount that would fit in a cigarette, at least. Many people report no effects from smoking kratom at all even at higher doses. i certainly didn't.
Pretty pungent. But I must say, it is not nearly as bad as how Kratom tastes. I gag just thinking of the taste of Kratom. The smoke is significantly less terrible...but still a bit harsh.
Capsules or small balls of powder mixed with flour and a tiny bit of water to make it stick together are the way to go, easily swallowed and no foul taste.
Smoking is just a waste, you burn all the alkaloids you're after so it doesn't do anything except smell.