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- Allergy Drug List
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What are antihistamine (allergy) shots, and what are they used for?
Antihistamine shots are prescription medications that are used for the rapid medical treatment of conditions such as:
- Allergic reactions (a severe allergy to a substance)
- Anxiety
- Nausea
- Vomiting
- Motion sickness
- To induce sedation when injected into a patient
Antihistamine shots also are used to alleviate extra pyramidal symptoms of antipsychotic medications.
Histamine is a chemical that causes many signs and symptoms of allergy. Histamine is released from histamine-storing cells (mast cells) and attaches to other cells that have receptors for histamine on their surfaces. Histamine stimulates the cells to release chemicals that produce effects that we associate with allergy. Antihistamines blocks histamine receptors and thus prevent activation of cells with histamine receptors by histamine.
What are examples of generic and brand names of allergy shots?
Examples of the brand and generic names for this type of medication include:
- diphenhydramine (Benadryl)
- promethazine (Phenergan)
- hydroxyzine hydrochloride (Restall, Vistacot)
- dimenhydrinate (Dramamine, Driminate)
The formulation of this drug is available by prescription only to treat a patient with a specific condition. It is not available over-the-counter (OTC). Other formulations of antihistamine drugs are available over-the-counter that treat medical conditions such as:
- Mild allergic reactions
- Itching
- Mild allergy symptoms
- Allergic rhinitis
- Runny nose
Examples of OTC medicine available over-the-counter include:
- diphenhydramine (Benadryl)
- certirizine (Zyrtec)
- loratadine (Claritin)
- fexofenadine (Allegra)
- desloratadine (Clarinex)
- loratadine ODT (Alavert, Tavist ND)
QUESTION
See AnswerWhat are the side effects of allergy shots?
The common side effects of this type of medication include:
Health News
Which drugs interact with antihistamine shots?
Antihistamine injections have additive effects if used with alcohol or other central nervous system depressant medications such as:
- alprazolam (Xanax)
- clonazepam (Klonopin)
- diazepam (Valium)
- zolpidem (Ambien)
- zaleplon (Sonata)
- phenobarbital
- butalbital/acetaminophen/caffeine (Fioricet)
- codeine
- morphine (MSIR)
- hydromorphone (Dilaudid)
- buprenorphine (Buprenex)
- azelastine (Astelin)
Effects of antihistamines are prolonged if combined with monoamine oxidase inhibitors (MAOIs) such as:
- phenelzine (Nardil)
- selegiline (Zelapar, Emsam, and Eldepryl)
- tranylcypromine (Parnate)
- procarbazine (Matulane)
- rasagiline (Azilect)
- isocarboxazid (Marplan).
Antihistamine injections should be used with caution if the patient under medical care and receiving treatment with an MAOI drug.
What formulations of antihistamine injections are available?
- Prescription antihistamine injections are available in injection form.
- Diphenhydramine, promethazine, and dimenhydrinate are administered intramuscularly and intravenously.
- Hydroxyzine hydrochloride is administered only intramuscularly.
- Antihistamine injections are not recommended for administration via subcutaneous route.
Is it safe to have antihistamine shots during pregnancy or while breastfeeding?
- FDA lists diphenhydramine and dimenhydrinate as Pregnancy Category B and promethazine as Pregnancy Category C. Hydroxyzine does not have a Pregnancy Category. These categories mean that the safe and effective use of any antihistamine injection drug is not established in during pregnancy; therefore, if a patient is pregnant, medical treatment with this drug should be used only if clearly needed.
- It is not known whether an injected antihistamine drug enters breast milk; therefore, patients who are pregnant should seek medical advise and use caution before treatment with a prescription antihistamine injection medication in women who are breastfeeding.
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Summary
Antihistamine shots or injections are prescription drugs used for the rapid treatment of allergic reactions, anxiety, nausea, vomiting, motion sickness, and induce sedation. The common side effects of this type of medication include dizziness, drowsiness (sleepiness), dry mouth, blurred vision, urinary retention, increased or decreased blood pressure, headache, abnormal heart rate, nausea, trouble breathing, tiredness (fatigue), and weakness.
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Related Disease Conditions
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How Long Does an Allergic Reaction Last?
Allergic reactions may last for varying lengths of time. They may take a few hours to a few days to disappear. If the exposure to the allergen continues, such as during a spring pollen season, allergic reactions may last for longer periods such as a few weeks to months.
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Sore Throat
Sore throat (throat pain) usually is described as pain or discomfort in the throat area. A sore throat may be caused by bacterial infections, viral infections, toxins, irritants, trauma, or injury to the throat area. Common symptoms of a sore throat include a fever, cough, runny nose, hoarseness, earaches, sneezing, and body aches. Home remedies for a sore throat include warm soothing liquids and throat lozenges. OTC remedies for a sore throat include OTC pain relievers such as ibuprofen or acetaminophen. Antibiotics may be necessary for some cases of sore throat.
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Hives
Hives, also called urticaria, is a raised, itchy area of skin. Most often the cause of hives is unknown. Sometimes it is a sign of an allergic reaction to food or medications, but the cause of the allergy (the allergen) is unknown. Dermatographism and swelling (angioedema) may accompany hives. Treatment to get rid of hives and alleviate symptoms typically includes antihistamines.
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Skin Rash
The word "rash" means an outbreak of red bumps on the body. The way people use this term, "a rash" can refer to many different skin conditions. The most common of these are scaly patches of skin and red, itchy bumps or patches all over the place.
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Allergy
An allergy refers to a misguided reaction by our immune system in response to bodily contact with certain foreign substances. When these allergens come in contact with the body, it causes the immune system to develop an allergic reaction in people who are allergic to it. It is estimated that 50 million North Americans are affected by allergic conditions. The parts of the body that are prone to react to allergies include the eyes, nose, lungs, skin, and stomach. Common allergic disorders include hay fever, asthma, allergic eyes, allergic eczema, hives, and allergic shock.
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Eustachian Tube Problems
The Eustachian tube is a membrane-lined tube that connects the middle ear space to the back of the nose. Symptoms of Eustachian tube dysfunction or blockage include popping and/or clicking in the ear, and ear fullness and/or pain. Causes of Eustachian tube dysfunction or blockage include allergies, sinus infections, ear infections, and the common cold. Treatment includes home remedies to relieve pain and several maneuvers (swallowing, chewing gum, yawning, etc.), which can be done to improve Eustachian tube function. In severe cases, surgery may be necessary.
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Nosebleed
Nosebleeds are common in dry climates during winter months, and in hot dry climates with low humidity. People taking blood clotting medications, aspirin, or anti-inflammatory medications may be more prone to nosebleeds. Other factors that contribute to nosebleed are trauma (including nose picking, especially in children), rhinitis (both allergic and nonallergic), and high blood pressure. First-aid treatments for a nosebleed generally do not need medical care. Frequent or chronic nosebleeds may require medical treatment such as over-the-counter (OTC) medication, and prevention of nose picking.
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Mucus
Mucus is a standard substance produced by lining tissues in the body. Excess mucus or yellow, green, brown, or bloody mucus may indicate a problem. Mucus production may increase when allergies, a cold, flu, cough, or sore throat occur. Antihistamines and cold and flu medications may help alleviate excess mucus. A neti pot may be used to decrease nasal congestion and clear mucus.
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What Are the 4 Types of Allergic Reactions?
Allergists recognize four types of allergic reactions: Type I or anaphylactic reactions, type II or cytotoxic reactions, type III or immunocomplex reactions and type IV or cell-mediated reactions.
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Can You Suddenly Become Allergic to Cats?
Yes, it is possible to suddenly become allergic to cats, since various allergies can develop at any point in your life, such as a pet allergy.
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Cosmetic Allergies
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Panic Attacks
Panic attacks are sudden feelings of terror that strike without warning. These episodes can occur at any time, even during sleep. A person experiencing a panic attack may believe that he or she is having a heart attack or that death is imminent. The fear and terror that a person experiences during a panic attack are not in proportion to the true situation and may be unrelated to what is happening around them. Most people with panic attacks experience several of the following symptoms: racing heartbeat, faintness, dizziness, numbness or tingling in the hands and fingers, chills, chest pains, difficulty breathing, and a feeling of loss or control. There are several treatments for panic attacks.
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Motion Sickness
Motion sickness is a feeling of unwellness caused by the inner ear and balance systems. Motion sickness can include sea sickness, car sickness, and train or plane sickness. Symptoms include, headache, nausea, vomiting, fatigue, dizziness, cold sweats, and pale skin. Treatment for motion sickness includes home remedies such as ginger, avoiding large or fatty meals prior to traveling, and OTC and prescription medications.
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Hay Fever
Hay fever (allergic rhinitis) is an irritation of the nose caused by pollen and is associated with the following allergic symptoms: nasal congestion, runny nose, sneezing, eye and nose itching, and tearing eyes. Avoidance of known allergens is the recommended treatment, but if this is not possible, antihistamines, decongestants, and nasal sprays may help alleviate symptoms.
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Anaphylaxis
Anaphylaxis is a serious allergic reaction that affects a number of different areas of the body at one time and can be fatal. Causes of anaphylaxis can be a food allergy, latex allergy, allergy to insect stings/bites, asthma, or other materials or conditions. Symptoms include flushing, itching, hives, anxiety, and rapid or irregular pulse. Severe symptoms may be throat and tongue swelling, swallowing, and difficulty breathing. Some disorders appear similar to anaphylaxis such as fainting, panic attacks, blood clots in the lungs, heart attacks, and septic shock. If you think that you may be having an anaphylactic reaction, seek emergency care or call 911 immediately.
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What Are the Symptoms of a Milk Allergy in Adults?
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Food Allergy
The most common food allergies are to eggs, nuts, milk, peanuts, fish, shellfish, strawberries and tomatoes. Symptoms and signs of a food allergy reaction include nausea, vomiting, diarrhea, abdominal pain, itching, hives, eczema, asthma, lightheadedness, and anaphylaxis. Allergy skin tests, RAST, and ELISA tests may be used to diagnose a food allergy. Though dietary avoidance may be sufficient treatment for mild allergies, the use of an Epipen may be necessary for severe food allergies.
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Cold, Flu, Allergy Treatments
Before treating a cold, the flu, or allergies with over-the-counter (OTC) medications, it's important to know what's causing the symptoms, which symptoms one wishes to relieve, and the active ingredients in the OTC product. Taking products that only contain the medications needed for relieving your symptoms prevents ingestion of unnecessary medications and reduces the chances of side effects.
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Indoor Allergens
Indoor allergens are substances that can cause an allergic reaction in some people. Common sources of indoor allergens include dust mites, cockroaches, molds, pets, and plants. Avoiding indoor allergens is one way to reduce allergy and asthma symptoms.
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How Long Does It Take for Allergic Conjunctivitis to Go Away?
Without treatment, allergic conjunctivitis symptoms could last the entire time that your critical allergen is present — which can vary greatly.
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Eye Allergy
Eye allergy (or allergic eye disease) are typically associated with hay fever and atopic dermatitis. Medications and cosmetics may cause eye allergies. Allergic eye conditions include allergic conjunctivitis, conjunctivitis with atopic dermatitis, vernal keratoconjunctivitis, and giant papillary conjunctivitis. Dry eye, tear-duct obstruction, and conjunctivitis due to infection are frequently confused with eye allergies. Eye allergies may be treated with topical antihistamines, decongestants, topical mast-cell stabilizers, topical anti-inflammatory drugs, systemic medications, and allergy shots.
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How Do You Calm Down an Allergy Attack?
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What Causes Sudden Allergies in Adults?
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Is It Possible to Be Allergic to Cinnamon?
Cinnamon is a popular spice in many dishes. Cinnamon gives dishes a distinct flavor. Only a small percent of people experience allergic reactions after ingesting or coming into contact with cinnamon.
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Why Won’t My Allergy Symptoms Go Away?
Allergies happen when your body's immune system reacts to certain substances as though they are harmful. Allergy symptoms may not go away unless you avoid your triggers, stick to your medications, find the right combination of medications, and consider surgery.
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Allergic Cascade
The allergic cascade refers to allergic reactions that happen in the body in response to allergens. A variety of immune cells and chemical messengers participate in the allergic cascade. Symptoms of the allergic cascade range from mild swelling and itching to full-blown anaphylactic shock. Allergen avoidance and medications are used to prevent or treat allergies.
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What Are the 12 Food Allergens?
According to studies, the twelve most common food allergens include milk, peanuts, eggs, shellfish, soy, tree nuts, wheat, fish, corn, sesame seeds, mustard, and celery. Check out the center below for more medical references on food allergens, including multimedia (slideshows, images, and quizzes), related disease conditions, treatment and diagnosis, medications, and prevention or wellness.
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What Nuts Are the Worst for Allergies?
A nut allergy develops when the body's immune system becomes oversensitive to a particular protein in a nut. Nuts that are the worst for allergies include peanuts, walnuts, pecans, almonds, Brazil nuts and pine nuts.
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Can You Eat Avocado if You Have a Nut Allergy?
Since avocado is classified as a fruit and not a tree nut, you should be able to eat avocados even if you have a nut allergy. However, some studies have shown that avocados have similar proteins as chestnuts. So if you’re allergic to chestnuts, you may have to avoid avocados.
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How Do You Know If You Are Allergic to Mosquito Bites?
Mosquito bite allergies can cause issues if untreated. Learn the signs of a mosquito bite allergy, what causes it, and what you can do to treat it.
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What Is the Fastest Way to Fix Seasonal Allergies?
Seasonal allergies are common and tend to ramp up during the spring and summer. Learn about how to get rid of seasonal allergies fast with these 13 home remedies.
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Sinus Infection vs. Allergies
Both sinus infections and allergies (allergic rhinitis) cause symptoms such as runny or stuffy nose and fatigue. Sinus infection (known as sinusitis) is inflammation of the sinuses, caused by infection from bacteria, viruses, and/or fungi (molds). Allergic rhinitis occurs when certain allergies cause nasal symptoms. When a person with allergies breathes in an allergen, such as pollen, dust, or animal dander, symptoms such as runny or stuffy nose, itching, sneezing, and fatigue occur.
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What Are the Best Treatments for Allergic Conjunctivitis?
Learn what medical treatments can ease allergic conjunctivitis symptoms and help speed up your eye allergy recovery.
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What Is the Most Common Tree Nut Allergy?
The most common nut allergies are cashew, walnut, hazelnut and pistachio. In the U.S. the most common nut allergy is cashew, followed by walnut. In the U.K. the most common nut allergy is hazelnut.
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Are Food Allergies Passed Down Genetically?
A food allergy is a condition that causes your immune system to fight against a particular part of food — which is called an allergen. Food allergies can be hereditary — that is, parents can pass the likelihood of developing a food allergy to their children through genes that code for inherited traits.
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What Causes Allergy Flare-ups?
During certain seasons, allergies can make you miserable. Learn what causes allergy flare-ups during spring and summer.
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Latex Allergy
Latex allergy is a condition where the body reacts to latex, a natural product derived from the rubber tree. The reaction can either be delayed and cause a skin rash or immediate, which can lead to anaphylaxis. Avoiding latex is the most effective way to prevent an allergic reaction.
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Peanut Allergy
Peanut allergies cause signs and symptoms that include hives, itching, redness, and a rash. Severe reactions may cause decreased blood pressure, lightheadedness, difficulty breathing, nausea, and behavioral changes. Someone with a peanut allergy should have an EpiPen with them at all times.
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Allergy Treatment Begins at Home
Avoiding allergy triggers at home is one of the best ways to prevent allergy symptoms. Controlling temperature, humidity, and ventilation are a few ways to allergy-proof the home. Cleaning, vacuuming, and using HEPA air filters also helps control allergies.
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Insect Sting Allergies
The majority of stinging insects in the United States are from bees, yellow jackets, hornets, wasps, and fire ants. The severity of reactions to stings varies greatly. Avoidance and prompt treatment are essential. In selected cases, allergy injection therapy is highly effective.
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Is Allergic Conjunctivitis the Same as Conjunctivitis?
Allergic conjunctivitis may occur along with sneezing, runny nose, or sinus headache. Many people also find that they are tired and feel agitated.
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Can Fall Allergies Cause Sinus Headaches?
Fall allergies can cause symptoms such as sneezing, congestion, and sinus headache. Learn more about causes, treatment, and prevention of fall allergies.
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COVID-19 vs. Allergies
Though there is some overlap in allergy and COVID-19 signs and symptoms there are also significant differences. Symptoms that they have in common include headache, fatigue, tiredness, shortness of breath, wheezing, and sore throat. Fever does not occur with allergies but is one of the defining symptoms of COVID-19 infections.
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Drug Allergy
Drug or medication allergies are caused when the immune system mistakenly creates an immune response to a medication. Symptoms of a drug allergic reaction include hives, rash, itchy skin or eyes, dizziness, nausea, diarrhea, fainting, and anxiety. The most common drugs that people are allergic to include penicillins and penicillin type drugs, sulfa drugs, insulin, and iodine. Treatment may involve antihistamines or corticosteroids. An EpiPen may be used for life-threatening anaphylactic symptoms.
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What Are the Symptoms of Ragweed Allergy?
The common symptoms of ragweed allergy are sneezing, runny nose, itchy, watery red eyes, headache, nasal congestion, eye swelling, rashes and coughing.
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What Foods Cause Oral Allergy Syndrome?
Oral allergy syndrome, also called pollen food allergy syndrome or PFAS, is a type of food allergy caused by certain allergens found in both pollen and raw vegetables and fruits and some nuts. Foods that cause oral allergy syndrome include those in the birch, grass and ragweed families.
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How Can I Help My Child With a Peanut Allergy?
Since there is no cure for peanut allergies, prevention and keeping an epinephrine injector (EpiPen) on hand is key to helping your child’s allergy.
-
Is Food Intolerance the Same as Food Allergy?
Food intolerance is a condition in which an individual has difficulty in digesting certain foods. Consumption of these foods manifests as physical symptoms such as bloating, loose motion, gases, and bellyache. Food intolerance is quite common. Most people are aware of the foods that disagree with them.
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How Do You Get Tested for Food Allergies?
If you develop symptoms of a food allergy, your doctor will have you undergo a skin test or blood test to determine which foods you are allergic to.
Treatment & Diagnosis
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Medications & Supplements
- hydroxyzine
- Antihistamines (Oral)
- Nasal Decongestants
- Side Effects of Phenergan with Codeine (promethazine and codeine)
- dextromethorphan/decongestant/antihistamine - oral
- decongestant/antihistamine/anticholinergic - oral
- decongestant/narcotic antitussive/acetaminoph/antihistamine - oral
- narcotic antitussive/antihistamine - oral
- decongestant/narcotic antitussive/antihistamine - oral
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.