Chlorpheniramine Maleate.

Chlorpheniramine Maleate is antihistamine. This medicine, blocking histamine (some natural substance) that your body produces to allergic reactions. By impeding acetylcholine (natural substances) from its body, the drug helps some dry body fluids to alleviate the symptoms, such as cold and watery eyes. Available in tablet and syrup form.

Medicines to treat allergies, hay fever, colds, allergic conjunctivitis, vasomotor rhinitis. Symptoms in which drugs can be used are as follows:

Tränende eyes, itchy eyes, itchy nose and throat and skin rashes, coughing, sneezing, nose athletes.

How do you use?

- Use in accordance with the instructions on the label or in the manner prescribed by a doctor. Take tablets or liquid orally or without food. It can not be taken with milk or food, if there is an upset stomach.

- Do not crush or chew. Swallow whole.

- If you are familiar with the liquid form, shake the bottle before use, and use appropriate measuring spoon dose.

- His strength lies in their age and health Pasco. Therefore, it does not increase your dose.

- Take the most regular benefits.

- Take the same time every day, so you do not miss doses.

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Cyproheptadine.

Cyproheptadine relieves red, irritated, itchy, watery eyes; sneezing; and runny nose caused by allergies, irritants in the air, and hay fever. It may also be used to relieve the itching of allergic skin conditions, and to treat hives, including hives caused by exposure to cold temperatures and by rubbing the skin.

Cyproheptadine is also sometimes used to treat allergic reactions in people who have received blood products as part of medical treatment and to treat life-threatening allergic reactions after the symptoms have been brought under control with other medications.

Cyproheptadine should not be used to treat children younger than 2 years of age because it may cause serious or life-threatening side effects in young children. Cyproheptadine should be used carefully in children 2-11 years of age.

Cyproheptadine will help relieve symptoms but will not treat the cause of symptoms or speed recovery. Cyproheptadine should not be used to cause sleepiness in children. Cyproheptadine is in a class of medications called antihistamines. It works by blocking the action of histamine, a substance in the body that causes allergic symptoms.

Cyproheptadine also is used for the treatment of Cushing's Syndrome (an abnormal condition that is caused by excess hormones [corticosteroids]) and to treat certain types of headache such as migraine. Talk to your doctor about the possible risks of using this medication for your condition.

Before taking cyproheptadine,

- tell your doctor and pharmacist if you are allergic to cyproheptadine, other antihistamines, or any other medications.
- tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: other medications for allergies or colds; medications for anxiety, depression or seizures; muscle relaxants; narcotics medications for pain; sedatives sleeping pills, and tranquilizers. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
- tell your doctor if you have or have ever had asthma, glaucoma (a condition in which increased pressure in the eye can lead to gradual loss of vision), ulcers, difficulty urinating (due to an enlarged prostate gland), heart disease, high blood pressure,seizures, or an overactive thyroid gland.
- tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking cyproheptadine, call your doctor.
- if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking cyproheptadine.
- you should know that this medication may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you.
- remember that alcohol can add to the drowsiness caused by this medication.

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Betahistine.

Betahistine is used to treat Meniere's disease. Meniere's disease occurs when there is a build up of fluid within the inner ear. This causes symptoms such as tinnitus (buzzing in the ear), deafness and vertigo (a spinning sensation often causing vomiting). These attacks may last for a few hours and then not come back for months, or you may experience a cluster of attacks.

Betahistine works by reducing the amount of fluid in the inner ear and therefore relieves these symptoms.

Before taking Betahistine make sure your doctor or pharmacist knows if you

- are pregnant, trying for a baby or breast-feeding
- have ever had an allergic reaction to this or any other medicine
- suffer from, or have ever had, a peptic (stomach) ulcer
- suffer from asthma
- suffer from phaeochromocytoma (a tumour on the adrenal gland)
- are taking any other medicines, including those available to buy without a prescription, herbal and complementary medicines

Directions

Take your medication exactly as directed by your doctor.

Always read the manufacturer's information leaflet, if possible, before beginning treatment.

Try to take this medicine at the same times each day to avoid missing any doses. If you miss a dose, take it as soon as you remember and continue taking it at the usual times. However, if it is nearly time for your next dose, leave out the missed dose and continue as normal. Never take two doses at the same time to make up. If in doubt speak to your pharmacist or doctor.

Take Betahistine with food.

Never take more than the prescribed dose. If you suspect that you or someone else has taken an overdose of Betahistine contact your doctor or go to the accident and emergency department of your local hospital at once. Always take the container with you, if possible, even if empty.

This medicine is for you. Never give it to others even if their condition appears to be the same as yours.

Side Effects

Along with their needed effects, all medicines can cause unwanted side effects, which usually improve as your body adjusts to the new medicine. Speak with your pharmacist or doctor if any of the following side effects continue or become troublesome: Upset stomach, indigestion, headache, rash, itching

If you experience any other worrying side effects, which you think may be due to this medicine, not mentioned in this leaflet, discuss them with your pharmacist or doctor.

Source

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Antihistamine / Histamine Antagonist.

Anti-histamines are a group of medications that block the effects of histamine, a chemical released in the body during an allergic reaction. These medications can prevent or reduce the symptoms of an allergic reaction.

An allergy is a condition in which the body becomes unusually sensitive to some substance, such as pollen, mold spores, dust particles, certain foods, or medicines. These substances, known as Allergens, cause no unusual reactions in most people. But in people who are sensitive to them, exposure to Allergens causes the immune system to overreact. The main reaction is the release of a chemical called Histamine from specialized cells in the body tissues. Histamine causes such familiar and annoying allergy symptoms as sneezing, itching, runny nose, and watery eyes.

As their name suggests, Anti-histamines block the effects of Histamine, reducing allergy symptoms. When used for this purpose, they work best when taken before symptoms are too severe. Anti-histamine creams and ointments may be used to temporarily relieve itching. Some Anti-histamines are also used to treat motion sickness, nausea, dizziness, and vomiting. And because some cause drowsiness, they may be used as sleep aids.

H1 antihistamines are used to relieve allergies, alleviating symptoms such as runny nose, itching, swelling, or asthma. H2 antihistamines suppress acid production by the stomach, and are used in the treatment of peptic ulcers, often making surgery unnecessary.

Some Anti-histamine products are available only with a physician's prescription. Others can be bought without a prescription. These drugs come in many forms, including tablets, capsules, liquids, injections and suppositories. Some common Anti-histamines are Astemizole (Hismanal), Brompheniramine (Dimetane, Dimetapp), Chlorpheniramine (Deconamine), Clemastine (Tavist), Diphenhydramine (Benadryl), Doxylamine (an ingredient in sleep aids such as Unisom and Vicks NyQuil), Loratadine (Claritin), and Promethazine (Phenergan).

References :
1.http://www.pharmaceutical-drug-manufacturers.com/pharmaceutical-drugs/anti-histamine.html
2.http://encyclopedia.farlex.com/Anti-histamine
3.http://allergies.about.com/od/glossaryofallergyterm1/g/antihistamine.htm

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