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Allergy Drugs: Prescription and OTC »
The arsenal of allergy drugs includes dozens of medications that relieve allergy symptoms when confronted with a trigger known as an allergen. That trigger could be something from a plant, such as pollen, or something from an animal (pet dander, dust mites, cockroaches). Other allergy triggers include certain fragrances or chemical substances.
What causes a person's allergic reaction is highly individual. But the reactions are often universal: swelling and inflammation, especially around the eyes, nose, and throat, usually accompanied by itching.
Some allergy medications work against the effects of histamines, which are released during an allergic reaction. Other medications reduce swelling, affect the immune system, or affect release of other substances associated with allergic reactions.
Many allergy drugs are available without a prescription.
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The clinical trials with CLARINEX-D®12 HOUR Extended Release Tablets included 1248 patients, of which 414 patients received CLARINEX-D®12 HOUR Extended Release Tablets twice daily for up to 2 weeks. The percentage of patients receiving CLARINEX-D®12 HOUR Extended Release Tablets, and who discontinued from the clinical trials because of an adverse event was 3.6%. Adverse events that were reported by ≥ 2% of patients receiving CLARINEX-D®12 HOUR Extended Release Tablets, regardless of relationship to study drugs, are shown in Table 3.
Table 3: Incidence of Adverse Events Reported by ≥ 2%
of Patients Receiving CLARINEX-D® 12 HOUR (desloratadine and pseudoephedrine sulfate) Extended Release Tablets
| Adverse Reaction | CLARINEX-D® 12 HOUR BID (N = 414) |
Desloratadine 5 mg QD (N = 412) |
Pseudoephedrine 120 mg BID (N = 422) |
| Insomnia | 10% | 3% | 13% |
| Headache | 8% | 8% | 9% |
| Mouth Dry | 8% | 2% | 8% |
| Fatigue | 4% | 2% | 2% |
| Somnolence | 3% | 4% | 2% |
| Pharyngitis | 3% | 3% | 3% |
| Dizziness | 3% | 2% | 2% |
| Infection, viral | 2% | 2% | 2% |
| Nausea | 2% | 1% | 3% |
| Anorexia | 2% | 0% | 2% |
There were no differences in adverse events for subgroups of patients as defined by gender, age or race.
Observed During Clinical Practice: The following spontaneous adverse events have been reported during the marketing of desloratadine as a single ingredient product: headache, somnolence, dizziness, tachycardia, palpitations and rarely hypersensitivity reactions (such as rash, pruritus, urticaria, edema, dyspnea, and anaphylaxis), and elevated liver enzymes including bilirubin and very rarely, hepatitis.
There is no information to indicate that abuse or dependency occurs with CLARINEX® or CLARINEX-D®12 HOUR Extended Release Tablets.
No information provided.
Last reviewed on RxList: 2/4/2009
This monograph has been modified to include the generic and brand name in many instances.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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