MSNBC reported recently that a shot of carbon dioxide gas into the nose can help with allergies based on preliminary findings funded by Capnia , a company that makes the product. Upside : Symptoms of nasal allergies improved within 30 minutes. No liquid is involved... just carbon dioxide gas. Downside : Lasts only 4 hours 80% has nasal discomfort after use 25% became teary eyed 14-20% developed headaches My take? I'll pass on this drug... There are already good drugs with …
