Iota-Carrageenan Nasal Spray in Common Cold

Inclusion criteria: * Patients consider that they are in an early stage of common cold with symptoms of no more than 48 hours duration * Symptom score of equal or more than 1 for for at least one of the symptoms sore throat, runny nose and blocked nose on a 0-3 verbal rating scale * Total symptom score of equal or less 9 for symptoms headache, muscle ache, chilliness, sore throat, blocked nose, runny nose, cough, and sneezing measured on a 0-3 verbal rating scale * Patients agree to refrain from taking any products intended to prevent, intervene in, or treat cough/colds/flu, starting at study entry and continuing through day 10 (e.g. those containing zinc, Echinacea); use of a daily multivitamin is allowed. Exclusion criteria: * Known hypersensitivity or are allergic to any component of the test device * Clinically significant cardiovascular, endocrinological, neurological, respiratory, gastrointestinal disease or history or any current disease that is considered by the investigator as a reason for exclusion e.g. current allergic rhinitis, chronic obstructive pulmonary disease * Severe nasal septum deviation or other condition that could cause nasal obstruction such as the presence of nasal polyps. * History of nasal or sinus surgery that in the opinion of the investigator may influence symptom scores * Taking any prescribed medication other than for contraception, that is considered by the investigator as a reason for exclusion e.g. systemic steroids, intranasal medicines, antibiotics * Common cold or flu like symptoms for more than 48 hours. * Recent (within the previous 2 days) intake of a common cold medicine that in the opinion of the investigator may influence symptom scores (analgesics, nasal decongestants, cough medicines) * Current smoker (more than 10 cigarettes a day)