But at night, it could wear off long before morning.

There was no way you could know the drug would wear off in a few minutes.

But after six months or so it started wearing off.

Until then, even if you feel the effects wearing off, do not let them know it.

But the effect wears off for most patients by two years.

Six months, it took for the stuff to wear off.

In both cases, the effects wore off after a few hours.

Often when you know it is possible the need seems to wear off.

It had been days now and the effects were wearing off.

Whatever I'd had the night before must have worn off.