An Analysis of the Effect of Topical Cromolyn Sodium on Rosacea-associated Erythema

Inclusion Criteria: * Subject is male or non-pregnant female, 18 - 80 years of age. * Subjects willing and able to give informed consent. * Subjects willing and able to comply with the requirements of the study. * Subject has the clinical diagnosis of at least mild erythema. * Subject has been on a stable dose for greater than 3 months of medications for treatment of concurrent medical condition (including oral contraceptive pills, vasodilators, adrenergic blocking agents) OR the investigator has determined that the medications are unlikely to affect the patient's rosacea and/or treatment during the study * Subject is in general good health in the opinion of the investigator. Exclusion Criteria: * Subject has a diagnosis of Steroid Rosacea or Pyoderma Faciale (rosacea fulminans) * Subject has a history of Carcinoid, Pheochromocytoma, Serotonin Syndrome or other systemic flushing causes. Subject has used facial topical therapies (OTC drug products or prescription products) for any reason within the prior 28 days * Subject has used systemic corticosteroid or systemic antibiotics (especially doxycycline, minocycline, tetracycline, metronidazole) within the prior 28 days. * Subject has had laser or light-based treatment for rosacea within the prior 3 months. * Subject has had systemic retinoids and retinoid derivatives over the past 6 months * Subject has any history of renal or hepatic insufficiency. * Subject has a known hypersensitivity or allergy to Cromolyn sodium or components of the vehicle. * Subject is pregnant or lactating or planning a pregnancy during the duration of the study * Subject has been treated with another investigational device or drug within 28 days prior to study enrollment or intends to participate in a clinical trial concurrent with this study * Subject has clinically significant findings, medical history or conditions (other than rosacea), which in the opinion of the Investigator may compromise the study, treatment protocol, or safety of the patient or treatment allocation. Subject has a known hypersensitivity or allergy to tape or other adhesive materials