antihistamines Antihistamines are used to treat both seasonal and perennial allergic rhinitis and conjunctivitis, skin rashes, having allergic nature, as well as helping with insect bites, allergic reactions provoked.Modern drugs antihistamine actions are divided into two types: the first generation, has a sedative effect, and second, do not cause drowsiness.

Sedation drugs of the first generation is manifested not only sleepiness, but the effect on psychomotor activity and brain function.These drugs cause patients constant desire to sleep, fatigue, or, conversely, excitement, loss of coordination, loss of ability to concentrate, tremor of limb
s and gait disturbance.And if drowsiness - subjective feeling, and there are objective indicators of deterioration of brain function: decreased ability to perform mathematical calculations, the ability to drive a car or work with complex technical devices. Sedation first-generation antihistamines is greatly enhanced in combination with alcohol.They absolutely can not take together.

second-generation antihistamines have a sedative action and almost no contraindications, so widely used and used to block allergy symptoms such as sneezing and itchy, allergic rhinitis and conjunctivitis, skin rashes.These drugs do not have a blocking effect on the other receptors, and does not accumulate in the body.For drugs of the first generation are popular "Diphenhydramine" "Tavegil" "Suprastin" "Pipalfen" and "Fenkarol" second generation - drugs such as "Allergodil" or "klaretin".

How to drink antihistamine tablets

preparations of the first generation, you can usually take 3 times a day or more, for a long time to maintain an antihistamine effect.The action recommended dosages of second generation long, usually they are taken once a day.You can not combine simultaneous intake of first and second generation. strictly follow the recommended dosage of antihistamines.Increasing the dose may be at increased risk of side effects.

But you should be aware that the majority of first-generation antihistamines have contraindications that preclude the use of these drugs for long.These include: glaucoma, gastric ulcer and duodenal ulcers, asthma, prostate adenoma.