Anemia (uh-NEE-me-uh) is a condition in which your blood has a lower than normal number of red blood cells. Anemia also can occur if your red blood cells don't contain enough hemoglobin (HEE-muh-glow-bin). Hemoglobin is an iron-rich protein that gives blood its red color. This protein helps red blood cells carry oxygen from the lungs to the rest of the body. If you have anemia, your body doesn't get enough oxygen-rich blood. As a result, you may feel tired or weak.
Signs and symptoms of a drug allergy often occur within an hour after taking a drug. Less commonly, reactions can occur hours, days or weeks later. Drug allergy symptoms may include: 1  Skin rash. 2  Hives. 3  Itching. 4  Fever. 5  Swelling. 6  Shortness of breath. 7  Wheezing. 8  Runny nose.
The primary goal when treating an allergic drug reaction is symptom relief. Symptoms such as rash, hives, and itching can often be controlled with antihistamines, and occasionally corticosteroids. For coughing and lung congestion, drugs called bronchodilators may be prescribed to widen the airways.ymptoms of a drug allergy can range from mild to life-threatening. Even in people who aren't allergic, many drugs can cause intolerance and irritation, such as an upset stomach.