You’ll usually be safe to drive after taking products that contain dextromethorphan, but it can sometimes make you feel sleepy, dizzy, or drowsy.
If this happens to you, do not attempt to drive or operate tools or machinery until you’re absolutely sure that it’s safe for you to do so.
You may also want to consider asking your pharmacist to recommend a cough medicine that won't make you feel drowsy or for a medicine you can take before bed instead.