The lecturer's soporifical tone lulled half the audience into drowsiness.

The lecturer spoke soporifically, and half the students struggled to stay awake.

The new over-the-counter medication had a soporific effect on several patients, making them drowsy during the day.

After hours of restless tossing, she finally decided to take a soporific to fall asleep.

The doctor warned against mixing soporifics with alcohol, since they can dangerously depress breathing.

The apothecary handed me a small soporifick wrapped in paper, warning that its effects were stronger than modern medicines.

The soporifick lecture had half the audience nodding off before the hour was up.

The lab accidentally released several soporificks into the ventilation system, causing everyone to yawn uncontrollably.