Any over-the-counter help for someone with runny nose?

Yes. Antihistamines and decongestants can help greatly. An over the counter pill taken once a day like Cetirizine or loratidine might be just what you need.
Age Limits. Keep in mind that due to safety issues, these drugs are not recommended to be used under 6 yrs of age, and some experts believe under 12 yrs of age.