"Tea always has a soporific effect on my psychomotor system," he said, his words slurring a bit.

Weary with long travel and the soporific effect of a rich meal, I forced my wits to work.

We know that drug; the soporific effect lasts for days.

He swore he would find a way to do without the soporific effect.

The soporific effect of Saravio's singing would, he hoped, mask his own efforts.

Food and drink - The soporific effects of a big meal or alcoholic beverages are well known.

I was hoping to find a natural alternative that would give you the desired soporific effect without all the side effects drugs often carry.

Ten-year-olds, in my experience, have a natural immunity to the soporific effects of beauty.

Ruining someone else's evening was bound to have a soporific effect.

"Yes, but-" He sighed as she yielded to the soporific effects of the drugs.