Symptoms Of Drug Allergy

Most allergic reactions will begin as soon as the drug. However, you can develop an allergic reaction to the drug after it was up to several weeks.

The symptoms of allergy drugs include:

Rash

Urticaria (hives)

Fever

Swelling of the face

Difficulty breathing

Dizziness

Anaphylaxis, a potentially fatal reaction

Anaphylaxis

Anaphylaxis is rare, but it is the most serious allergic reaction to drugs and is a medical emergency. Anaphylaxis symptoms usually begin within minutes of exposure to a drug. Medicines that you put on your skin can take longer to cause a reaction. Signs and symptoms of anaphylaxis include:

Tightening (constriction) of respiratory and throat, causing breathing difficulties

Shock, a severe drop in blood pressure

Weakness, rapid pulse

Nausea, vomiting or diarrhea

Dizziness, lightheadedness or loss of consciousness

You can have an allergic reaction to a drug that has caused problems in the past.

If you have an allergic reaction to drugs, the immune system responds to drugs harmful invaders. This causes the release of histamine and other chemicals that cause allergic symptoms. The immune system then becomes the key to react the same way, if you take the drug again in the future. However, changes in the immune system over time, and, finally, you can drug your allergies may go away by themselves.

When to see a doctor

Talk to your doctor if you have a reaction to a medication, or if you have signs or symptoms of a drug allergy.

Call your doctor if you have a reaction after taking a drug. Mild allergic reactions are usually treated by stopping the drug and substitute another. If possible, ask your doctor when the allergic reaction is happening. This will help identify the cause and make sure you get treatment if necessary.

Try to treat the signs of a severe reaction or anaphylaxis after the suspected drug. Signs and symptoms of adverse reactions in an emergency are:

Of the airways or throat

Rapid pulse

Dizziness

Dizziness

Loss of consciousness