Eyes are an important means of obtaining information. Therefore, special attention should be paid to the health of the said organ. To this end, experts recommend visiting an optometrist at least once a year, checking eyesight and conducting a full examination. This is especially true in cases where the patient regularly blushes and hurts his eyes.
To minimize the negative impact of external factors on the visual organs, doctors recommend the use of special drops. One of the best drugs to improve eye condition is Vizin. Instructions for this tool, its indications, adverse reactions, methods of use, analogues and other information will be presented later.
Description, composition, packaging
Vizin drops, the instructions for which, together with the drug, are enclosed in a pack of cardboard, represent a clear, colorless solution (0.05%), which is sold in plastic dropper bottles (15 ml) with a first opening control.
The main component of this medication is tetrisoline hydrochloride. The preparation also includes the following auxiliary substances: boric acid, disodium edetate dihydrate, sodium chloride, 50% solution of benzalkonium chloride, purified water, sodium tetraborate.
The principle of action of local medicine
How do Vizin eye drops work? The instructions for use report that the high therapeutic efficacy of this medication is due to the presence in it of such an active substance as tetrizoline. This is a sympathomimetic component that is able to stimulate the alpha-adrenergic receptors of the sympathetic NS (nervous system). However, it does not have or has a weak effect on beta-adrenergic receptors.
Tetrizoline is a sympathomimetic amine; in this regard, it has a pronounced vasoconstrictor effect, and also eliminates tissue edema in a short time.
How long does the drug (ophthalmic) “Vizin” work? The instruction says that the therapeutic effect of this medicine begins a minute after instillation and lasts for 4-8 hours.
Pharmacokinetic characteristics
Is there a local absorption of Vizin? The instruction states that detailed pharmacokinetic studies of this drug have not been conducted. However, experts argue that with topical use of eye drops, their systemic absorption is possible, but only in patients with damage to the epithelium or mucous membrane of the visual organs.
In what cases is prescribed?
What indications for use do Vizin eye drops have? The instruction indicates the following conditions:
- allergic reactions (for example, with hay fever);
- children over two years of age and adults to relieve conjunctival hyperemia (i.e., redness of the eyes) and swelling of the visual organs that have arisen due to physical and chemical factors (for example, due to smoke, wind, dust, chlorinated water, light, cosmetics, contact lenses).
Prohibitions for appointment
According to the instructions of Vizin, contraindications to the use of this local drug is the presence of the following conditions in a patient:
- endothelial-epithelial corneal dystrophy;
- angle-closure glaucoma;
- high sensitivity to the substances of the product;
- children's age up to two years.
Careful use
Despite the seemingly harmless composition of the drug in question, it is not recommended to use it without first consulting with a specialist. It should also be used with extreme caution in people with pheochromocytoma, severe cardiovascular diseases (including arterial hypertension and IHD), hyperthyroidism, prostatic hyperplasia, diabetes mellitus, dry keratoconjunctivitis, porphyria, glaucoma, and dry rhinitis. The same applies to patients who receive MAO inhibitors or other drugs that can increase blood pressure.
Eye drops "Vizin": instructions for use
The medicine in question is used only topically.
Children from two years of age and adults are prescribed one drop in each affected eye, twice or thrice a day.
The use of the medication for more than four consecutive days should be carried out only under the supervision of a doctor.
Features of use
How to instill the drug "Visin"? The instructions for using the dropper bottle should be studied by all patients who have been prescribed this medicine.
Drops "Vizin" go on sale in plastic packaging, protected from accidental opening. When using the bottle for the first time, remove the control tape from the cap. Next, you need to press on it (above) and at the same time turn counterclockwise. After this, remove the lid from the container and, turning it over, drip into the eyes in the right amount.
It is highly recommended not to touch the tip of the bottle to any surface. After using the medicine, screw the cap tightly.
If the patient was prescribed the drug "Vizin Classic", which is available in ampoules for single use, then you should definitely study the attached instructions, as it has some distinctive features.
Each ampoule of the "Vizin Classic" is intended for single use. In this regard, the drug must be used immediately after opening the container. The volume of the drug in one ampoule is strictly dosed and sufficient for a single injection into both visual organs.
Thus, in order to use the drug, it is necessary to break off the ampoule from the strip and open it by unscrewing the unfilled part. Next, the drug should be instilled into the conjunctival sac, pressing on the filled half of the container.
Side effects, overdose
When using Vizin eye drops, the following adverse events may develop in patients:
- pupil dilation;
- general disorders and disorders at the injection site, including burning sensation, redness, swelling, irritation, pain and itching.
It should be noted that the severity of adverse reactions, their frequency and appearance in children are similar to those in adults.
As for overdose, according to the instructions, the risk of negative phenomena when exceeding the recommended doses of the drug is minimal. However, if the product is accidentally swallowed, the patient may develop the following symptoms: fever, dilated pupil, pulmonary edema, nausea, cardiac arrest, cyanosis, CNS depression, cramps, respiratory depression, tachycardia, arterial hypotension, arrhythmia, etc.
Experts report that if a drug enters the gastrointestinal tract, the patient is prescribed gastric lavage, activated charcoal, oxygen inhalation, as well as anticonvulsant and antipyretic drugs.
If there are signs of overdose, which were described above, the patient urgently needs to see a doctor.
Similar medicines, patient reviews
If it is not possible to purchase the drug "Visin", it can be replaced by similar means (for example, medicines "Spersallerg", "Montevizin", "VisOptic", "Nafazolin", "Octilia"). However, you should always consult an ophthalmologist before doing this.
Patient reviews about the drug in question are found on the World Wide Web quite often. As a rule, they are positive. They said that the vasoconstrictor effect of this drug manifests itself very quickly. In this case, the blood supply and redness of the conjunctiva of the eyes significantly decreases.
As for specialists, they also confirm the effectiveness of Vizin drops. However, doctors immediately stipulate that such a vasoconstrictor drug should be used for a short time, since it can cause the development of adverse reactions. In addition, experts do not recommend the use of these drops if the patient feels tired, dry, and reddened after prolonged exposure to a computer or smartphone. In such cases, it is better to use other means, for example, moisturizing the mucous membrane.