Primalan: Uses, Precautions, Side Effects, Overdoses and Storage

It is a medicine that is used for allergic rhinoconjunctivitis, chronic urticaria, among other conditions.

Its active ingredient is Mequitazine and acts by blocking the actions of endogenous histamine.

What is an allergic rhinoconjunctivitis?

It is the inflammation of the mucosa in the nose and the eye (conjunctiva), produced by an allergen agent that generates an exaggerated attack of the defenses for the little or harmless damage it can represent in the organism.

Product of the defensive reaction generated by the defenses of the body, itching occurs in the nose, nasal congestion, burning and redness in the eyes and inflammation in conjunctival and nasal mucosa.


This medication is counterproductive for pregnant or lactating women, since the components can be transferred to the unborn baby or the baby born through breast milk.

It is not recommended to drive at night or to drive heavy machinery while the body adjusts to the treatment with Primalan, since it can generate drowsiness or disorientation, which can be harmful for the individual.

Anyone who is in treatment with Primalan should bear in mind that it is essential to avoid ingesting:

  • Alcoholic drinks.
  • Barbiturates
  • Antipsychotics
  • Hypnotics
  • Ansiolíticos.
  • Opioid analgesics

This medicine is not recommended for people with severe liver diseases, if it is necessary to dose, the specialist doctor must take a strict monitoring of the effects produced to the patient to avoid adverse effects and harmful to their health.

The Primalan can not be shared with another person even if it has the same symptoms or is presumed to have the same affection. This should be determined by a medical specialist, since its inappropriate use can be harmful to the life of the affected and more when the condition is not known exactly.

Use or Treatment

The treatment should be recommended by a treating doctor, depending on the severity of the condition to be treated, however, it is common to use the Primalan for approximately once a day for three days, after the food to begin to see results favorable.

But the treatment should last more than a week to eliminate the condition. If the person who is in dosing with Primalan feels that his health has improved but he has not finished the treatment, under no circumstance should his use be suspended.

Otherwise the disease can become immune to treatment, worsening in the short or long term, which would require the intake of other drugs to combat it, without guaranteeing a rapid and forceful improvement.


There have been no proven cases where the Primalan generates overdose in the body by ingesting higher doses than those pre-registered by a treating doctor, however, its excessive use can contribute serious side effects to the body, even harmful to the patient’s health.

That is why it should not be ingested more than the account. Self medicating or increasing doses will not make the condition better faster, or in less time.


The Primalan should be stored under a room temperature and in a cool place, it is not necessary to refrigerate it and it should be far from heat, humidity or cold.

Care should be taken to keep out of the reach of children or pets, because it can be harmful to their lives to consume it without being prescribed by a specialist.

Under no circumstances can it be flushed down the toilet or drain for disposal because it can contribute to environmental pollution.

Side effects of Primalan

The Primalan does not usually produce side effects when it is in treatment, however, in some cases the following symptoms have occurred:

  • Sudden dizziness
  • Headache after the dose of the medication.
  • Drowsiness.
  • Lack of coordination.
  • Disorientation.
  • Psychomotor impairment.

Some people when maintaining a treatment with Primalan can generate an allergic reaction, such as:

  • Swelling or swelling of the face, lips, throat or tongue.
  • Itching in the extremities of the body.
  • Acne.
  • Redness in the skin
  • Difficulty breathing.
  • Numbness of the body
  • High body temperature without reaching high fever.


If you are in treatment with Primalan and it has expired, ask your treating doctor if there are any complications from ingesting it that way. To date there have been no unfavorable cases with consuming it after the expiration date.

Studies indicate that its use after the expiration date can diminish its effectiveness without damaging or generating side effects to the patient in treatment. The recommended thing is to ask the treating doctor because in those cases it is necessary to increase the dose to achieve the desired results.