Claritin D contains loratadine, an antihistamine, and pseudoephedrine, a decongestant. The "D" stands for "decongestant," indicating this version treats both allergy symptoms and nasal congestion.
Loratadine blocks histamine receptors, reducing sneezing, runny nose, and itching. Pseudoephedrine narrows blood vessels in nasal passages, relieving congestion. Together, they address multiple allergy symptoms.
| Ingredient | Type | Purpose |
|---|---|---|
| Loratadine | Antihistamine | Relieves sneezing, runny nose, and itching |
| Pseudoephedrine | Decongestant | Reduces nasal congestion |
Use Claritin D when you have allergy symptoms plus nasal congestion. The pseudoephedrine makes it stronger than regular Claritin for congestion relief. However, it may cause side effects like nervousness or insomnia due to the stimulant properties of pseudoephedrine.
A 2016 study published in the journal Allergy found that pseudoephedrine improved nasal airflow compared to placebo. However, some users report side effects like dry mouth or increased heart rate.
Many people confuse Claritin D with Claritin. Regular Claritin contains only loratadine, while Claritin D adds pseudoephedrine. The "D" version is not suitable for everyone, especially those with high blood pressure or heart conditions, due to the pseudoephedrine.
If you can't take pseudoephedrine, consider non-drowsy allergy medications without decongestants or nasal steroid sprays. Always check with a healthcare provider before switching medications.