Is it a problem to take both sudafed and claritin (loratadine)?

Use them wisely: Sudafed is a brand name of pseudoephedrine, a decongestant used to decrease nasal congestion and secretions. Claritin is a brand name for loratadine, an antihistaminic. Claritin-d is one brand name for the combination of these two medications. This combination of medications helps to reduce nasal allergy symptoms. Long-term continuous use of decongestant result in some cases with loss of effect.