Features of allergy during pregnancy
This reaction may occur in those women who had not previously suffered from allergies. And this is due to the change in the functioning of the immune system. If the future mother by nature is allergic, then allergic manifestations can be expressed in varying degrees - from mild to very severe. Their main types in pregnant women are:
- Rhinitis. This is the most frequent symptom that can arise from the second trimester.
- Conjunctivitis. It is in most cases combined with rhinitis.
- Contact dermatitis or eczema. The latter is a thickening and swelling of the epidermis, its redness, itching.
- Hives. In severe cases, it can develop into a quincke's edema.
- Signs of bronchial asthma. The risk of exacerbation increases at the end of the second trimester.
The allergy of a future mother is the risk of hypoxia of the fetus after the spasms of the blood vessels of the placenta. The causes of its manifestations are seasonal phenomena, the use of allergen products, contact with household chemicals, and other negative effects.
On the types of antihistamines
Today, there are three generations. In such drugs, the principle of action is the same. But the difference lies in the attachment of drug molecules to receptors in the body.
Antihistamines of the first generation have a powerful effect and an additional anticholinergic effect. This is Diphenhydramine, Suprastin, Tavegil, Pipolphen, Diazolin. Their main side effect is a person's tendency to drowsiness (sedation).
Representatives of the second generation are Fenistil, Claritin, Astemizol. Their main "minus" is the cardiotoxic effect. Sedation they do not have, because they do not block H3-receptors. But the effect of using the above drugs comes only after a few days of regular admission.
Antihistamines of the third generation are also intended for long-term therapy of allergic ailments. They do not possess a cardiotoxic property. Such drugs are usually well tolerated. Representatives of this category of drugs are Erius, Cetirizine (Cetrin, Zirtek), Telfast.
What are allergies treated for pregnant women?
In the "interesting situation" there is a need and rapid relief of acute allergic reaction, and long-term treatment of the disease. However, it is necessary to take into account the side effects of drugs, their effect on the fetus. Therefore, not all antihistamine drugs can be used to treat pregnant women. They are categorically forbidden to be treated independently, using such drugs without first consulting a doctor.
In acute manifestations of allergies, an allergist is required to consult. Usually such women are hospitalized, they are prescribed complex therapy for the relief of a dangerous condition.
If a hypersensitivity reaction occurs in the first trimester, it is highly undesirable to use antihistamines. At this stage, there is a huge risk of complications in the fetus. So, for example, Tavegil and Astemizol have an embryotoxic effect, and Diphenhydramine can cause uterine contractions. This is the risk of self-abortion.
At the same time, if there is a threat to the life of the mother, the doctor decides on the appointment of first-generation drugs.
In the third and second trimesters, antihistamines can be taken for the purpose of an allergist and only when the potential benefit of treatment exceeds the possible risk. We are talking about such drugs: Claritin, Cetirizin, Feksadin (Telfast). Suprastin is used under strict medical supervision.
Before giving birth, you must cancel all prescription antihistamines, To avoid sedation and suppression of the fetal respiratory center.