Drug Allergy Glossary of Terms

The following are health and medical definitions of terms that appear in the Drug Allergy article.

Abdominal: Relating to the abdomen, the belly, that part of the body that contains all of ...

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Abdominal pain: Pain in the belly. Abdominal pain can be acute or chronic. It may reflect ...

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Adverse reaction: In pharmacology, any unexpected or dangerous reaction to a drug. An unwa...

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Allergic reaction: The hypersensitive response of the immune system of an allergic indiv...

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Allergy: A misguided reaction to foreign substances by the immune system, the body system ...

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Anaphylactic shock: A widespread and very serious allergic reaction. Symptoms include dizz...

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Anaphylaxis: Allergic reaction. In severe cases, this can include potentially deadly anap...

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Anemia: The condition of having a lower-than-normal number of red blood cells or quantity ...

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Antibody: An immunoglobulin, a specialized immune protein, produced because of the introdu...

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Antigen: A substance that the immune system perceives as being foreign or dangerous. The b...

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Antihistamines: Drugs that combat the histamine released during an allergic reaction by bl...

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Asthma: A common lung disorder in which inflammation causes the bronchi to swell and narro...

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Autoimmune: Pertaining to autoimmunity, a misdirected immune response that occurs when the...

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Bacteria: Single-celled microorganisms that can exist either as independent (free-living) ...

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Blood pressure: The blood pressure is the pressure of the blood within the arteries. It is...

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Capsule: Capsule has many meanings in medicine including the following:

  1. In medici...

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Cardiac: Having to do with the heart.

Cardiovascular: Relating to the circulatory system, which comprises the heart and blood ve...

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Cell: The basic structural and functional unit of any living thing. Each cell is a small c...

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Chemotherapy: 1. In the original sense, a chemical that binds to and specifically k...

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Chest: The area of the body located between the neck and the abdomen. The chest contains t...

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Cisplatin: An anticancer drug that belongs to the family of drugs called platinum compound...

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Clostridium: A group of anaerobic bacteria (bacteria that thrive in the absence of oxygen)...

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Clostridium difficile: A bacterium that is one of the most common causes of infection of t...

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Cough: A rapid expulsion of air from the lungs, typically in order to clear the lung airwa...

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Diarrhea: A common condition that involves unusually frequent and liquid bowel movements. ...

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Emergency department: The department of a hospital responsible for the provision of medica...

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Eosinophil: A normal type of white blood cell that has coarse granules within its cytoplas...

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Eosinophilia: An abnormally high number of eosinophils in the blood. Normally, eosinophils...

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Epidermal: Pertaining to the epidermis, the outermost layer of the skin.

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Epinephrine: Also known as adrenaline. A substance produced by the medulla inside of the a...

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Fever: Although a fever technically is any body temperature above the normal of 98.6 F (37...

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Gastrointestinal: Adjective referring collectively to the stomach and small and large inte...

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Genetic: Having to do with genes and genetic
information.

Heart: The muscle that pumps blood received from veins into arteries throughout the body. ...

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Hemolytic: Referring to hemolysis, the destruction of red blood cells which leads to the r...

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Hemolytic anemia: Anemia due to the destruction, rather than underproduction, of red blood...

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Histamine: A substance that plays a major role in many allergic reactions, dilating blood ...

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Hives: A raised, itchy area of skin that may be a sign of an allergic reaction. It can be ...

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Ibuprofen: A nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to treat pa...

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Immune: Protected against infection, usually by the presence of antibodies.

Immune complex: A cluster of interlocking antigens and antibodies forming a large network ...

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Immune response: Any reaction by the immune system. For example, poison ivy can cause an i...

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Immune system: A complex system that is responsible for distinguishing a person from every...

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Immunology: The study of all aspects of the immune system, including its structure and fun...

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Inflammation: A localized reaction that produces redness, warmth, swelling, and pain as a ...

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Interleukins: Substances used in biological therapy. Interleukins stimulate the growth and...

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Itching: An uncomfortable sensation in the skin that feels as if something is crawling on ...

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Joint: The area where two bones are attached for the purpose of permitting body parts to m...

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Kidney: One of a pair of organs located in the right and left side of the abdomen. The kid...

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Lightheadedness: A feeling you are "going to faint." Lightheadedness is medically distinct...

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Liver: The largest solid organ in the body, situated in the upper part of the abdomen on t...

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Low blood pressure: Any blood pressure that is below the normal expected for an individua...

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Lungs: The lungs are a pair of breathing organs located with the chest which remove carbon...

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Lymph: The almost colorless fluid that travels through the lymphatic system, carrying cell...

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Metabolism: The whole range of biochemical processes that occur within a living organism. ...

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Morphine: A powerful narcotic agent that has strong analgesic (pain relief) action and oth...

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Narcotic: 1. A drug that causes insensibility or stupor. A narcotic induces narcosi...

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Nausea: Stomach queasiness, the urge to vomit. Nausea can be brought on by many causes, in...

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Neck: The part of the body joining the head to the shoulders. Also, any narrow or constric...

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NIEHS: Stands for National Institute of Environmental Health Sciences, one of the National...

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Opioid: 1. A synthetic narcotic that resembles the naturally occurring opiates. 2. Any sub...

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Organ: A relatively independent part of the body that carries out one or more special func...

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Pain: An unpleasant sensation that can range from mild, localized discomfort to agony. Pa...

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Penicillin: The most famous of all antibiotics, named for the fungal mold Penicillium n...

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Prescription: A physician's order for the preparation and administration of a drug or dev...

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Prognosis: The forecast of the probable outcome or course of a disease; the patient's chan...

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Pulmonary: Having to do with the lungs.

Rash: Breaking out (eruption) of the skin. A rash can be caused by an underlying medical c...

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Red blood cells: The blood cells that carry oxygen. Red cells contain hemoglobin and it is...

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Respiratory: Having to do with respiration.

Serum: The clear liquid that can be separated from clotted blood. Serum differs from plas...

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Shock: In medicine, a critical condition that is brought on by a sudden drop in blood flow...

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Stevens-Johnson syndrome: A serious systemic (bodywide) allergic reaction with a character...

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Syndrome: A combination of symptoms and signs that together represent a disease process.

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Systemic: Affecting the entire body. A systemic disease such as diabetes can affect the wh...

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T cell: A type of white blood cell that is of key importance to the immune system and is a...

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Tongue: A strong muscle that is anchored to the floor of the mouth. The tongue is covered ...

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Topical: Pertaining to a particular surface area. For example, a topical agent is applied ...

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Ultrasound: High-frequency sound waves. Ultra-sound waves can be bounced off tissues by us...

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Wheezing: A whistling noise in the chest during breathing. Wheezing occurs when the airway...

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White blood cell: One of the cells the body makes to help fight infections. There are seve...

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Wrist: The part of the hand that is nearest the forearm and consists of the carpal bones a...

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Medical Dictionary