Benadryl is not recommended for seasonal allergies due to its frequent side effects and the availability of other options like Aerius, which is available over the counter. It is important to also use non-pharmacological measures such as nasal hygiene with saline water and changing clothes when coming indoors after being outside for a long time. It is advisable to keep windows closed when allergen levels are high. Consult with a pharmacist for personalized advice and recommendations.