Diphenhydramine for allergies: the rules of admission and patient testimonials

Димедрол при аллергии: правила приема и отзывы пациентовGood day, my beloved readers. Diphenhydramine if you are allergic often prescribed by physicians and it has certain reasons.

Many people know that this drug is administered intramuscularly at a high temperature, however not all understand the feasibility of its use in allergic attacks.

So why do allergies Diphenhydramine is assigned? Read the article and find out.

Diphenhydramine — General information

Often this drug prescribed for the inpatient treatment for the relief of allergic attacks. In addition, it is often used in the «Trinity»:

  • Analgin;
  • Papaverine hydrochloride;
  • Diphenhydramine.

These medicines mix in the syringe and injected against high temperature and pain syndrome in infectious diseases.

There are several formulations of the above drugs:

  • tablet;
  • powder;
  • candles (for the kids);
  • for external use gel, cream, ointment.

Pills are rarely used because of the high probability of side effects and a wide range of contraindications. Diphenhydramine is most often administered intramuscularly. How can it help allergies?

The principle of action of Diphenhydramine hypersensitivity

Main effects of medication:

  • antiemetic;
  • antihistamines;
  • anti-inflammatory;
  • hypnotic.

Димедрол при аллергии: правила приема и отзывы пациентовDiphenhydramine reduces the permeability of blood vessels, blocks the activity of histamine receptors, and thereby prevents the development of allergic attack.

In addition, it eliminates swelling, relieves itching significantly, has antispasmodic effect and is local anesthesia. After the introduction of the drug inside the maximum effectiveness comes after an hour or three.

The duration of effects on the body is equivalent to four to six hours.

Now you know what the Diphenhydramine helps allergic. By the way, this medication can treat the allergic attacks not only in adults but also in children. What about its use during pregnancy?

Possible or not Diphenhydramine pregnant?

In such a crucial period in a woman’s life the above medication is not take. Edge, it is contraindicated in nursing mothers. Newborn drug may develop pathology of different nature and to provoke complications of congenital diseases.

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Safe analogues of Diphenhydramine are antihistamines generation 3:

  • Zyrtec;
  • Aerius;
  • Effective;
  • Claritin;
  • Loratadine.

The only disadvantage of the above analogues is the higher price.

Who is prescribed?

Diphenhydramine is assigned to Allergy sufferers with the following symptoms of hypersensitivity:

  • rhinitis, pollinosis, conjunctivitis;
  • itching, manifestations of food intolerance;
  • kapilliarotoxicos;
  • anaphylactic shock;
  • swelling Quincke type;
  • in case of sleep disorders on the basis of hypersensitivity.

As allergic attack treated with Diphenhydramine?

Adults recommend an injection three times (if the Allergy is severe) per day in a dosage of 30-50 mg. the Duration of treatment is equal to ten to fifteen days.

Димедрол при аллергии: правила приема и отзывы пациентовChildren from two to six years is prescribed the maximum daily dosage of 75 mg, children of 6-12 years of age — 150 mg maximum per day. The Diphenhydramine ointment applied several times a day on the affected allergic rashes or peeling areas of the body.

Sometimes the above medication is used to treat allergic seizures in animals, particularly in dogs. Amount of medication for a single administration is selected individually taking into account the weight of the pet.

In any case, it is not recommended to inject Diphenhydramine pet without prior consultation with the vet.

Are there any Diphenhydramine contraindications/side effects?

Above the article mentioned that this drug has some restrictions for acceptance and side effects. Dimedrol for Allergy sufferers is prohibited from:

  • individual intolerance;
  • pregnant and lactating moms;
  • ulcer of the stomach and duodenum;
  • angle-closure glaucoma;
  • by the age of two years old;
  • alcoholics (drug with alcohol is strictly incompatible).

Side effects of drugs are manifested mainly after excessive dosage. These include:

  • shortness of breath;
  • violations of various nature in the Central nervous system;
  • dryness in the mouth and redness of the face;
  • seizures (develop mainly in children).
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Knowing the risks, think again, whether to apply a Dimedrol with serious bouts of hypersensitivity. To prevent attacks it is better to prefer light antihistamines.

The high cost of drugs, such as Zyrtec, loratadine, Aerius, etc., due to the absence of serious contraindications and side effects.


The effectiveness of Diphenhydramine is confirmed by the positive feedback from Allergy sufferers, which offer you to see.

Natalia writes:

Димедрол при аллергии: правила приема и отзывы пациентовI this medicine helped to cure the serious allergic attack to pollen. The only thing I don’t like this feeling of sleepiness that plagued me constantly during treatment.

Victor writes:

Димедрол при аллергии: правила приема и отзывы пациентовInjected medicine to a child with a severe allergic attack. After most symptoms have passed. Then was treated for Pain, as I didn’t want to risk it.


Overall, nothing bad about the Diphenhydramine, I can not say. The only thing that should be concerned is contraindications, as too many of them.

Maxim writes:

Димедрол при аллергии: правила приема и отзывы пациентовOnce the shot saved my life. Not knowing ate a piece of red fish, which I’m terribly allergic. Soon came the seizure in the form of a dyspnea and shock.


In the restaurant where all this was happening, luckily there was a medic. He sent the waiter for Diphenhydramine in pharmacy. If not for this medicine, it could all end in tears.

That’s all the information on anti-allergic properties of Diphenhydramine. If you liked the article, feel free to share it with your friends on social networks and subscribe to the updates of this website. All the best to you!

The author: Elena Smirnova (dermatologist)