Deselex is a brand name for the generic drug desloratadine. It is a prescription medication indicated to alleviate symptoms associated with seasonal allergies, such as nasal congestion or hives. This medication is part of a class of drugs called antihistamines and works by limiting the affect of histamine, a substance induced by allergies, within the body. In the United States, Desloratadine is marketed under the brand name Clarinex in the U.S.
Headache or Dizziness
While taking Deselex, patients can develop side effects of headache or dizziness due to treatment, according to health officials at Medline Plus, an online medical encyclopedia established by the National Institutes of Health and the U.S. National Library of Medicine. Headache symptoms are typically mild but can persist throughout Deselex treatment. Episodes of dizziness or lightheadedness can cause patients to become unstable while standing or walking. If such sensations arise, remain seated to prevent further injury from tripping or falling.
Stomach Upset or Dry Mouth
Stomach upset symptoms can arise in certain patients following treatment with Deselex. These stomach-related side effects can include indigestion or nausea, explains PDR Health, a health information website supported by the publishers of the Physicians' Desktop Reference. Treatment with this medication can also lead to sensations of dryness within the mouth or a sore throat. In combination, these side effects can cause loss of appetite in certain patients. Eating a small snack or meal before taking a dose of Deselex can help limit the occurrence of these stomach-related side effects.
Fatigue or Muscle Pain
Patients taking Deselex can experience unusual tiredness of fatigue as a side effect of treatment, warns Drugs.com, a peer-reviewed drug information website for consumers. Fatigue can also occur in conjunction with muscle or joint pain in certain patients. Side effects of fatigue can significantly interfere with a patient's ability to remain alert and active while at work or school. Affected patients may take frequent naps throughout the day or may go to bed earlier than usually due to these Deselex side effects.
Women taking Deselex can experience menstruation changes as a side effect of treatment, warn Medline Plus health officials. Use of this medication can cause increased sensations of pain during menstruation, which can be irritating or uncomfortable. These side effects can occur in conjunction with fatigue and upset stomach and may progressively subside with continued use of Deselex. Patients who experience severe menstruation pain should talk with a gynecologist as this side effect can be indicative of alternate medical complications.