The plants pollinate about 5 AM and 5PM, so it is important to sleep with the windows shut to avoid the 5 AM pollen, and to drive in the late afternoon with the car windows closed. This is because these spices add to the histamine already in your body which makes the allergy symptoms. Today there are some excellent antihistamines available over the counter. I would start with Chlortrimeton. The problem is that everyone reacts differently to these pills.
Some people feel drowsy at a small dose.
There are other antihistamines that have less sedation for most people such as Seldane or Claritin. On prescription, there are several steroid nasal sprays, such as Vancenase or Flonase. If they work, this is a preferred treatment because there aren't any systemic effects, such as you might get with antihistamines. In 1996 we feel that allergy can be reduced or avoided when there is a family history of allergy if the child is nursed. All children should sleep in rooms with minimal dust.