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pharmacyfolio Allergy or drug side effect? Is there a difference?

An estimated 50 million Americans suffer from some type of allergy. Each year allergies account for more than 17 million outpatient office visits, with seasonal allergies accounting for more than half of all allergy visits, according to the Asthma and Allergy Foundation of America.

As a result of the immune system overreacting to an allergen (foreign substance), you may experience coughing, sneezing, itching, runny nose and sore throat, for example. A severe reaction can cause rashes, hives, lower blood pressure, difficulty breathing, asthma attacks and even death.

Drug allergies
Drug allergies are less common than drug side effects, and most people may never experience an allergy. Symptoms of a drug allergy may occur quickly (within minutes) or several days after taking the drug. Half of all allergic reactions occur just one week after starting the drug, and symptoms usually disappear three to five days after stopping the drug.

Sometimes patients who are allergic to certain foods can experience an allergic reaction to the inactive ingredients in a drug product that contains traces of the allergens. Eight foods are responsible for 90 percent of food allergies. They are milk, soy, eggs, wheat, peanuts, tree nuts (walnuts, cashews), fish and shellfish. These can be found in drug products. For example:

  • The popular asthma inhalers Advair, Serevent, and Foradil all contain lactose, a product derived from milk.
  • Children’s Benadryl Allergy Fastmelt, an over-the-counter product, contains soy protein isolate.
  • Vaccines for influenza and the measles, mumps, rubella (MMR) vaccine are made in cells from chick eggs.

It is best to consult with your physician or pharmacist for recommendations on treatment or a course of action when an allergy or a potential for an allergy is suspected.

Drug side effects
A drug side effect is an expected normal response of your body to a medication at therapeutic doses caused by a drug’s normal function. Every drug is capable of causing side effects. You may take a drug to relieve one symptom, but it may unintentionally, or in some cases intentionally, cause you to experience other symptoms or side effects. For example, antihistamines such as Benadryl commonly cause drowsiness. Diuretics, such as furosemide, are designed to produce frequent urination.

Photo of someone writing a prescriptionTake action
Prevention is key. That’s why it’s important to communicate before you medicate. If you do have a reaction, whether allergic or drug side effect, recognizing the symptoms and taking action can save your life. Seek immediate medical attention if you are experiencing symptoms such as difficulty breathing or swelling of the lips, tongue or face.

Common drug side effects and allergy symptoms
Side Effects
Nausea
Vomiting
Diarrhea
Stomach cramps
Light-headedness
Increased heart rate
Fatigue
Frequent urination
Hot flashes
Insomnia

Allergies
Increased heart rate
Skin rash
Hives
Itching of skin or eyes
Wheezing
Swelling of lips, tongue or face

Tips To Remember

  • Do not take a drug you have reacted to in the past without consulting your physician or pharmacist.
  • Read the ingredients on food nutrition labels and also note the inactive ingredients on packaging of drugs.
  • Consider wearing a medical alert ID bracelet or necklace listing your allergies.
  • Tell your health care provider about any prescription or over-the-counter medications you are taking.
  • If you are having a reaction, immediately consult your physician and/or pharmacist and stop consuming the food or taking the drug that caused the reaction.

Find Out More
Food Allergies
www.nlm.nih.gov/medlineplus/ency/article/000817.htm

Drug Allergies
www.nlm.nih.gov/medlineplus/ency/article/000819.htm

Formulary update
Quarterly, pharmacists and medical professionals review the prescription drug list to ensure it includes safe, cost-effective medications and reflects changes in the availability of certain drugs. Unless otherwise indicated, the generic equivalents of brandname drugs deleted from the list continue to be covered at the lowest copayment. They are safe, effective and can save you money. Visit our website for the complete list.

Additions*
Effective 4/01/06
Apidra
Fortical
Levemir
Revlimid
Sutent

Effective 5/01/06
Niaspan
Zemplar oral

Effective 6/01/06
Fosrenol

Effective 8/01/06
Exjade
Orencia
ProAir HFA
Tamiflu (limit 10 caps/6 mos.)

* Fortical added to tier 1; all others added to tier 2.

 
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