I took an analgesic because I had a severe headache.

When making bread, you need a leavening agent.

It is important to use mouthwash every day after brushing your teeth.

On sleepless nights, I sometimes take a soporific.

When I catch a cold, I often take a sudorific.

This mixture is used to alleviate the symptoms of a cold.

The police used tear gas against the demonstrators.

This lunch box includes a refrigerant.

It's my habit to take vitamin pills every day.

This germicide can kill 99.9% of bacteria.