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Allergies and antihistamines

Skin allergies are reactions of the skin to substances known as allergens, which can cause itching, redness or spots. Learn how to identify the causes and choose appropriate care to prevent and relieve these reactions.
Informations antihistaminiques pour allergies cutanées
Biology
7 min of reading
What should we know about antihistamines used to alleviate skin allergies?

Itching, redness, and swelling are often the primary symptoms of a skin allergic reaction, such as urticaria or contact eczema. To soothe these symptoms, antihistamines are frequently prescribed. Find out everything you need to know about this family of medicines in the following.

Inefficacité des antihistaminiques face à une allergie cutanée.
Biology
8 min of reading
Skin Allergies: What to do when antihistamines don't work?

To alleviate skin rashes, redness or itching due to an allergic reaction, it is quite common to prescribe antihistamines. However, in some cases, these medications prove to be ineffective. What can be done when antihistamines are no longer sufficient to manage allergic skin reactions? Discover here the alternative treatments that can better handle these situations.

Effets secondaires antihistaminiques
Biology
5 min of reading
What are the side effects of antihistamines?

Antihistamines have been used for many years to alleviate allergic reactions. However, there are times when these medications can cause side effects that are more or less bothersome. What are the adverse effects associated with antihistamines? Continue reading to discover them.

Mode d'action des antihistaminiques.
Biology
4 min of reading
Antihistamines: How do they work?

Hypersensitivity to a substance or product can trigger an allergic reaction in the form of itching, skin rashes, sneezing... Antihistamines help to alleviate the effects associated with allergies. Discover in this article their precise mode of action that enables them to relieve allergic reactions.

Perte d'efficacité des antihistaminiques avec le temps.
Biology
5 min of reading
Do antihistamines lose their effectiveness over time?

It is common to use antihistamines to alleviate an allergic reaction. However, some may perceive a decrease in their effectiveness over time. Is this reality or merely an impression? Let's delve deeper into this subject.

FAQ about allergies and antihistamines

How does a skin allergy manifest itself?

The symptoms of an allergy include itching, redness, skin rashes and sometimes blisters.

What are the most common cosmetic allergens?

Perfumes, essential oils, preservatives and metals are among the allergens most commonly found in cosmetic products.

What is the difference between a skin allergy and irritation?

A skin allergy involves an immune response, whereas irritation is a non-allergic reaction of the skin to irritating substances.

Can a hypoallergenic product cause a skin allergy?

Yes, even though hypoallergenic products are formulated to reduce the risk of skin allergy, it remains possible.

Are cosmetic allergies hereditary?

Yes, there is often a genetic component in skin allergies. Indeed, these are frequently caused by a hypersensitivity of the immune system.

What are the different types of antihistamines?

The main antihistamines used are H1 antihistamines for allergies and H2 antihistamines for gastric disorders, but H3 and H4 antihistamines also exist.

What are the most commonly used antihistamines?

Loratadine, cetirizine and fexofenadine are among the second-generation antihistamines most commonly used.

Do antihistamines cause drowsiness?

The antihistamines of the first generation, such as diphenhydramine, can cause drowsiness, but this side effect is very rare with second‑generation agents.

Can antihistamines be taken without a prescription?

Certain antihistamines are available over the counter, but it is preferable to seek advice from a doctor or pharmacist.

Can antihistamines be used during pregnancy?

It depends on the specific antihistamines, but some can be used by pregnant women. The key point is to consult your doctor beforehand.

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