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Boric acid instructions for use

Boric acid is an antiseptic preparation for external use. This drug is used for various infectious diseases of the skin and mucous membranes, including ectoparasitosis.

Release form and composition

Boric acid is available in several dosage forms for external use - ointment, solution and powder. In each dosage form, the main active ingredient is boric acid. Auxiliary components and packaging depend on the dosage form of the drug:

  • A 70% solution of ethyl alcohol is part of a 3% solution of boric acid, which is contained in bottles of 70 ml.
  • Powder is available in 2, 10 and 20 g.
  • Boric acid ointment 5% is made on the basis of vaseline, packaged in jars of 25 g.

Various dosage forms and packaging of boric acid enable its use in infectious diseases of different localization.

pharmachologic effect

Boric acid is a powerful antiseptic. It destroys various microorganisms due to the coagulation and denaturation processes (violation of the tertiary structure of the protein molecule) of their intracellular proteins. Boric acid is active against various bacteria, viruses, fungi and ectoparasites (lice, ticks).

The drug is used for external use. After application to the mucous membrane or skin, it has a pharmacological effect and destroys microorganisms that cause infectious diseases. Boric acid can be partially absorbed into the systemic circulation.

Indications for use

The use of boric acid as an antiseptic is indicated for the etiotropic (destruction of the pathogen microorganism) treatment of various infectious processes of the skin and mucous membranes, these include:

  • Acute otitis media (infectious inflammation of the outer and middle ear), which uses a solution of boric acid.
  • Infections of the skin - a fungal infection of the skin caused by various fungi and inflammatory processes (furuncle, carbuncle, pyoderma, eczema ).
  • Conjunctivitis is an infectious inflammation of the conjunctiva of the eye.
  • Pediculosis - ectoparasitosis caused by lice.
  • In the complex treatment of scabies (parasitizing in the skin of scabies mites).
  • Colpitis is an infectious pathological process of the vaginal mucosa.

The main condition for the correct use of the drug is the integrity of the skin or mucous membranes.


The use of boric acid is contraindicated in various pathological and physiological conditions of the body, which include:

  • Violation of the integrity of the skin or mucous membranes (including the eardrum) in the area of ​​application of the drug.
  • Individual intolerance or hypersensitivity reaction to boric acid or auxiliary components of its various dosage forms.
  • Pregnancy at any time and breastfeeding - since boric acid is absorbed into the systemic circulation from the skin or mucous membranes, its negative influence on the developing fetus is not excluded.
  • Impaired functional activity of the kidneys with the development of their failure.
  • Children under the age of 15 years.

Before using the drug, make sure that there are no contraindications.

Dosage and administration

Regardless of the dosage form, the drug Boric acid is used only externally. It is applied to the area of ​​localization of the infectious inflammatory process. There are such methods of using various medicinal forms of the drug:

  • Boric acid solution - applied to the skin or scalp (with pediculosis) with a cotton-gauze pad 2-3 times a day. For the treatment of acute otitis media, the solution is instilled into the external auditory meatus in the amount of 1-2 drops 2-3 times a day.
  • Ointment - applied to the mucous membranes with a uniform thin layer, with conjunctivitis a small amount of ointment is laid under the conjunctival sac. The ointment is applied 2 times a day.
  • Powder - this dosage form is used to treat infectious processes in the skin, accompanied by soaking (weeping eczema), the affected area is covered with a thin layer of powder 2 times a day.

The duration of the course of treatment is determined by the severity of the main infectious pathological process, the degree of reduction in the intensity of symptoms and tolerance of the drug. Usually, the course of treatment is set individually by the attending physician.

Side effects

Most of the side effects and negative reactions during the application of boric acid are associated with its absorption into the systemic circulation, these include:

  • Dyspeptic syndrome (nausea, vomiting, unstable stool, abdominal pain)
  • From the side of the central nervous system - headache, confusion of consciousness (up to its complete absence), convulsions .
  • On the part of the cardiovascular system, a decrease in systemic arterial pressure (hypotension) up to a shock, tachycardia (increased heart rate).
  • On the part of the urinary system - a decrease in the daily volume of urine (decrease in diuresis).

It is also possible the development of local negative side effects in the application of the drug in the form of a reaction of irritation, desquamation (epithelial sloughing). Sometimes allergic reactions develop on the skin in the form of a rash and itching, urticaria (a characteristic rash and swelling of the skin, resembling a stinging nettle). In rare cases, perhaps the more severe allergic reaction is angioedema of the Quincke (marked swelling of the skin and subcutaneous tissue in the face and external genitalia) and anaphylactic shock (progressive reduction in systemic arterial pressure with the development of multiple organ failure).

special instructions

Before using boric acid, you should carefully read the instructions for the drug, it is important to pay attention to several features regarding its use:

  • Do not rinse the abdominal organs (stomach, intestines) with a solution of boric acid, as this can lead to severe overdose and the absorption of large amounts of boric acid into the systemic circulation.
  • The area of ​​the skin or mucous membranes for processing powder should not be significant.
  • Alcohol solution and powder are not used for application to mucous membranes (except for instillation of the solution in the ear canal).
  • The drug can not be used for pregnant and lactating women, children under the age of 15 years.
  • The use of boric acid in the recommended therapeutic doses according to the instructions does not affect the speed of psychomotor reactions and concentration.

In pharmacies, boric acid is available without a doctor's prescription. In case of doubts or questions regarding its use, it is necessary to consult a doctor.


In case of application of a significant amount of the drug with absorption of boric acid into the systemic circulation, symptoms of acute poisoning develop - nausea, vomiting, diarrhea, abdominal pain. Then comes the oppression of the functional activity of the nervous system, confusion, up to its loss, a pronounced decrease in systemic arterial pressure. In chronic poisoning (absorption of a small amount of boric acid into the blood for a long time), anemia (anemia), stomatitis (inflammation of the oral mucosa), alopecia (hair loss), cachexia (marked general exhaustion), menstrual disorders in women develop. In case of overdose, general detoxification measures and symptomatic therapy are carried out. In severe cases of severe overdose, peritoneal dialysis or hemodialysis (hardware cleansing of blood plasma) is performed.

Boric acid analogues

Analogues of boric acid for clinical and therapeutic action are antiseptics of other groups - hydrogen peroxide, chlorhexedine, brilliant green solution.

Terms and conditions of storage

The expiration date from the moment of production for powder is 5 years, for solution and ointment of boric acid - 3 years. The drug should be stored in a dark, dry place at an air temperature not higher than + 25 ° C. Keep out of the reach of children.

Boric acid price

Boric acid powder 10g - 32-50 rub.

Boric acid solution of 3% 25 ml - 10-15 rub.

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