Oral decongestants such as Sudafed and Nyquil contain pseudoephedrine or phenylephrine and can cause more serious side-effects like irregular heartbeat or blood pressure changes. These medications are not safe for long-term use. Thankfully, you should not need to take these while using Allermi. Allermi targets congestion directly in the nasal passages, allowing you to avoid systemic treatments.
Learn more about oral decongestants safety in this article.
