Key takeaways
Loratadine/pseudoephedrine (Claritin-D) and guaifenesin/pseudoephedrine (Mucinex D) are both over-the-counter medications that help relieve nasal congestion and sinus pressure. They both contain pseudoephedrine, a decongestant, which helps clear your sinuses. However, they differ in their other active ingredients and uses. Claritin-D combines loratadine, an antihistamine, with pseudoephedrine to treat allergy symptoms like runny nose and itchy eyes, while Mucinex D combines guaifenesin, an expectorant, with pseudoephedrine to help loosen mucus and ease chest congestion. Claritin-D is available in 12-hour and 24-hour tablets, while Mucinex D is available as an extended-release tablet taken every 12 hours. Both medications can cause side effects like headache and trouble sleeping, but Claritin-D may also cause drowsiness, while Mucinex D might cause anxiety. You should avoid taking other medications with similar ingredients to prevent overdose and serious side effects.
