Non-drowsy medications are designed to relieve symptoms like allergies or colds without causing sleepiness. They often contain ingredients such as antihistamines that do not cross the blood-brain barrier, allowing users to stay alert and active while treating their symptoms. These medications are commonly used for conditions like hay fever, nasal congestion, and itchy eyes. Popular non-drowsy options include loratadine and cetirizine, which provide effective relief without the sedative effects associated with some older antihistamines. Always consult a healthcare professional before starting any new medication.