Side Effects of Claritin D 24 Hour

Claritin-D 24-Hour treats symptoms associated with seasonal allergies, including congestion, a stuffy or runny nose, sneezing, and itchy or watery eyes. The ingredients of the over-the-counter medication include loratadine, an antihistamine, and pseudoephedrine, a decongestant. As with all medications, Claritin-D 24-Hour could have side effects.

Common Side Effects

• Common side effects of Claritin-D include drowsiness, a headache, coughing, a loss of appetite, nausea and sleeplessness, according to Drugs.com.

Serious Side Effects

• Serious allergic reactions to Claritin-D 24-Hour are not common. But one should seek medical attention at the first sign of a rash, difficulty breathing and swelling of the throat, face or tongue.

Severe Side Effects

• Severe side effects require immediate medical intervention. These include irregular heartbeat, chest pain, difficulty urinating, intense mood swings, seizures and excessive shaking.

Cardiovascular Side Effects

• The pseudoephedrine in Claritin-D 24-Hour has the potential to cause heart arrhythmias in patients who might be predisposed to the condition. Rare but potentially fatal cardiovascular side effects associated with pseudoephedrine and loratadine include palpitations and cardiac arrest.

Drug Interactions

• Claritin-D 24-Hour might have adverse side effects when combined with medications to control high blood pressure and stimulating drugs, such as methylphenidate, or herbal supplements containing ephedra. One should use caution when combining Claritin-D with over-the-counter cold medications because these usually contain antihistamines and decongestants, which could increase the risk or intensity of common side effects.