Check with a doctor for correct dosage before using any of these on a baby or child.

It's best to check with a doctor before using medication.

Check with the local fire marshal before using one.

People at risk of heart problems should check with their doctor before using either medicine.

Check the expiration date of the condom before using it.

And be sure to check the expiration date before using the condom.

Check with your doctor before using chamomile if you have any health problems.

Check the security situation before using any of these crossings.

Check your armor after every servicing and before using it each day.

Check with your doctor before using any over-the-counter medicine for more than a few days at a time.