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Treatments and drugs

By Mayo Clinic staff

With low-grade fever, doctors don't always recommend trying to lower the body temperature. Doing so may prolong the illness or mask symptoms and make it harder to determine the cause.

Some experts believe that aggressively treating a fever interferes with the body's immune response. Viruses that cause colds and other respiratory infections thrive at normal body temperature. By producing a low-grade fever, your body may be helping to eliminate a virus.

Over-the-counter medications
In the case of a high fever, your doctor may recommend an over-the-counter medication, such as:

  • Acetaminophen (Tylenol, others) or ibuprofen (Advil, Motrin, others). Use these medications according to the label instructions or as recommended by your doctor. Be careful to avoid taking too much. High doses or long-term use of acetaminophen may cause liver or kidney damage, and acute overdoses can be fatal. If your child's fever remains high after a dose, don't give more medication; call your doctor instead. For temperatures below 102 F (38.9 C), don't use fever-lowering drugs unless advised by your doctor.
  • Aspirin, for adults only. Don't give aspirin to children, because it may trigger a rare, but potentially fatal, disorder known as Reye's syndrome.

Prescription medications
Depending on the cause of your fever, your doctor may prescribe an antibiotic, especially if he or she suspects a bacterial infection, such as pneumonia or strep throat.

Antibiotics don't treat viral infections, such as stomach infection (gastroenteritis) and mononucleosis. There are a few antiviral drugs used to treat some specific viral infections. However, the best treatment for most viruses is often rest and plenty of fluids.

References
  1. Dinarello CA, et al. Fever and hyperthermia. In: Fauci AS, et al. Harrison's Online. 17th ed. New York, N.Y.: The McGraw-Hill Companies; 2008. http://www.accessmedicine.com/content.aspx?aid=2871330. Accessed April 28, 2011.
  2. Fever. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/sec14/ch167/ch167e.html. Accessed April 28, 2011.
  3. Torpy J. Fever in infants. Journal of the American Medical Association. 2004;291:1284.
  4. Fever, sweats and hot flashes. National Cancer Institute. http://www.cancer.gov/cancertopics/pdq/supportivecare/fever/healthprofessional. Accessed April 28, 2011.
  5. Febrile seizures fact sheet. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/febrile_seizures/detail_febrile_seizures.htm. Accessed April 28, 2011.
  6. Ward MA. Pathophysiology and treatment of fever in infants and children. http://www.uptodate.com/home/index.html. Accessed April 25, 2011.
  7. O'Grady N, et al. Guidelines for evaluation of new fever in critically ill adult patients: 2008 update from the American College of Critical Care Medicine and the Infectious Diseases Society of America. Critical Care Medicine, 2008;36:1330.
  8. Sullivan JE, et al. Clinical report — Fever and antipyretic use in children. Pediatrics. 2011;127:580.
  9. Leggett J. Approach to fever or suspected infection in the normal host. In: Goldman L, et al. Cecil Medicine. 23rd ed. Philadelphia, Pa.: Saunders Elsevier; 2008. http://www.mdconsult.com/books/linkTo?type=bookPage&isbn=978-1-4160-2805-5&eid=4-u1.0-B978-1-4160-2805-5..50307-4. Accessed May 2, 2011.
  10. Bor DH. Approach to the adult with fever of unknown origin. http://www.uptodate.com/home/index.html. Accessed April 25, 2011.
DS00077 June 1, 2011

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