In the past antihistamines, often had a number of unpleasant side effects including sleepiness or hyperactivity, depending on the person. Some recently developed antihistamines work without crossing into the brain and so avoid many of the unwanted side effects. Decongestants offer relief of nasal and sinus congestion by narrowing blood vessels. Most decongestants are also stimulants, however, and may cause sleeplessness, nervousness and hyperactivity. A few adjustments to your daily routine may bring some relief from hay fever.
Regular exercise can help reduce respiratory congestion.
If you exercise outdoors, try to schedule your sessions for later in the day. Pollen and mold counts are highest in the morning. Use an air conditioner to cool your house in summer, if possible. When you open the windows your bring the pollens and molds inside. When allergies are more serious, make an appointment with your physician who may prescribe medication or a steroid nasal spray.