Unlike conventional medications that mask full-blown symptoms, SinusCalm works with your body to relieve nasal congestion, sinus pressure and pain, and sinus headache due to the common cold or allergies.* The non-drowsy meltaway tablets are phenylephrine-free and won't interact with other medications, including those for colds and allergies — two of the main causes of sinus congestion. Feel the difference with SinusCalm by Boiron. *Claims based on traditional homeopathic practice, not accepted medical evidence. Not FDA evaluated.