- Antihistamines against allergies: are they safe?
- The preparations of the new generation
- Operating principle
- In bronchial asthma
The use of antihistamines
Many antihistamines are available in pharmacies without a prescription - including the first-generation antihistamines (brompheniramine, chlorpheniramine, clemastine, diphenhydramine) and second-generation antihistamines (loratadine). Loratadine - one of the few available without a prescription antihistamines do not cause drowsiness.
Most drugs of second-generation antihistamines, does not have a pronounced sedation, released only by prescription - including cetirizine (brand name Zyrtec), desloratadine (brand name Clarinex), and fexofenadine (brand name Allegra). These antihistamines are generally do not cause side effects.
For the treatment of certain specific symptoms of allergic diseases - for example, rhinitis, pruritus sinuses - applicable antihistaminic nasal sprays (one of the most common spray - azelastine (tradename Astelin)).
Antihistamines block the release of histamine, which causes the symptoms of an allergic reaction
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. Especially effective antihistamines if taken regularly during the peak allergy season.
Receiving antihistamines is not recommended if there is an allergy to the drug or its components. In addition, antihistamines can interact with a number of other medications, so taking antihistamines are not recommended in the following cases:
- With regular use of antidepressants - monoamine oxidase inhibitors
- When glaucoma uzkouglovoy
- During pregnancy and breastfeeding
How to take antihistamines
Antihistamines are available in various forms - in the form of tablets, chewable tablets, capsules, drops, nasal sprays. The dosage and frequency of antihistamine drug depends on the type and specificity of allergic disease. With regular use of antihistamines
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at the same time is not recommended to use other drugs that cause drowsiness - sleeping pills, tranquilizers, sedatives
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. In addition, alcohol is not recommended, sedative effect of antihistamines. For fourteen days before you start taking antihistamines can not be used antidepressants - MAO inhibitors (isocarboxazid (Marplan), phenelzine sulfate (Nardil), tranylcypromine (Parnate)). Before you start regular intake of antihistamines is best to consult with your doctor about possible interactions with other antihistamine medications.
Side effects of antihistamines
Although antihistamines are considered the most safe mode of allergy medications, antihistamines, many (especially first-generation drugs) may cause the following side effects:
- Dry mouth
- Difficulty urinating
- Violation of
- Deterioration of concentration and attention