Guides you through decision to have allergy-shot immunotherapy to treat allergic rhinitis (hay fever) and allergic asthma. Explains how allergy shots work. Covers who should not have them. Includes interactive tool to help you make your decision.

Explains what allergy-shot immunotherapy is, why it is done, and what allergies it can help. Covers how it is done, how well it works, and what to expect after treatment. Covers risk factors.

Provides overview of tests used to find out what a person might be allergic to. Covers skin and blood tests. Explains why and how each test is done. Discusses risks. Explains results and offers points to consider before having tests.

What is a stem cell transplant? Most stem cells are in your bone marrow. You also have some that circulate from your marrow into your blood. Bone marrow stem cells turn into red blood cells, white blood cells, or platelets to help your body stay healthy. If your bone marrow is damaged or destroyed, it can no longer...

Allopurinol reduces the production of uric acid in your body. Uric acid buildup can lead to gout or kidney stones. Allopurinol is used to treat gout or kidney stones, and to decrease levels of uric acid in people who are receiving cancer treatment. Allopurinol may also be used for purposes not listed in this medication...

Almotriptan is a headache medicine that narrows blood vessels around the brain. Almotriptan also reduces substances in the body that can trigger headache pain, nausea, sensitivity to light and sound, and other migraine symptoms. Almotriptan is used to treat migraine headaches in adults and in adolescents who are at...

Aloe vera topical is made from the extract of the aloe vera plant leaf. Aloe vera is also known as Burn Plant, Elephant's Gall, Ghee-Kunwar, Hsiang-Dan, Kanya, Kumari, Lily of the Desert, Miracle Plant, and other names. Aloe vera topical has been used in alternative medicine as a possibly effective aid in treating...

Alogliptin and metformin is a combination medicine that is used together with diet and exercise to improve blood sugar control in adults with type 2 diabetes mellitus. This medicine is not for treating type 1 diabetes. Alogliptin and metformin may also be used for purposes not listed in this medication guide.

What is alopecia areata? Alopecia areata is a type of hair loss that occurs when your immune system mistakenly attacks hair follicles, which is where hair growth begins. The damage to the follicle is usually not permanent. Experts do not know why the immune system attacks the follicles. Alopecia areata is most common...

Alosetron blocks the action of a chemical called serotonin in the intestines. This slows the movement of stools (bowel movements) through the intestines. Alosetron is used to treat severe, chronic irritable bowel syndrome (IBS) in women with diarrhea as the main symptom for at least 6 months. Alosetron is given after...

Alpha 1-proteinase inhibitor is a protein, also called alpha 1-antitrypsin. This protein occurs naturally in the body and is important for preventing the breakdown of tissues in the lungs. In people who lack the alpha 1-antitrypsin protein, breakdown of lung tissues can lead to emphysema (damage to the air sacs in the...

Alpha-lipoic acid is an antioxidant also known as Acetate Replacing Factor, ALA, Biletan, Lipoicin, Thioctan, and many other names. Alpha-lipoic acid is a naturally occurring fatty acid that can be found in many foods such as yeast, spinach, broccoli, potatoes, and organ meats such as liver or kidney. Alpha-lipoic acid...