Generic medicine
Antazoline + Tetryzoline
Temporary relief of the signs and symptoms of allergic conjunctivitis including conjunctival hyperaemia, chemosis and itching in adults and children above 2 years of age.
Dose and dosage
Human
Adults and adolescents: 1 drop 2 to 3 times daily upto 14 days. Children (Older than 2 years of age): No specific studies are available in this patient group. For possible systemic effects, the dosage should exceed to 1 to 2 drops per day. Children (Below 2 years of age): Not to be used in children below 2 years of age.The eye drop should not be used for longer periods than 14 days as this may cause rebound hyperemia and toxic follicular conjunctivitis.
Clinical notes
Applications:
- Keratitis
Indication Notes:
Temporary relief of the signs and symptoms of allergic conjunctivitis including conjunctival hyperaemia, chemosis and itching in adults and children above 2 years of age.
Avoid In:
N/A
Contraindication Notes:
Known hypersensitivity to Antazoline/ Tetryzoline or to any of the excipients. Concomitant use with Monoamine Oxidase Inhibitors (MAOI).
Antazoline is an anti-histamine of the ethylenediamine class, which are selective HI-antagonist. Effects mediated by HI receptors include the contraction of smooth muscle and the dilation and increased permeability of the capillaries. Tetryzoline is a sympathomimetic with alpha-adrenergic activity. Its vasoconstrictive effect reduces redness and edema in allergic conjunctivitis. Antihistamines, which act by blocking the HI histamine receptor, are highly effective in providing relief of itching but are not very active in relieving the associated redness. The use of products combining an anti-histamine and a vasoconstrictor is well established in the symptomatic relief of allergic eye disease.
Sympathomimetic agents may cause a hypertensive crisis if used during treatment with MAOIs. Concomitant use with MAOIs is therefore contraindicated. Sedating anti-histamines can enhance the sedating effects of CNS depressant including alcohol, hypnotics, opioid analgesics, anxiolytic sedatives and anti-psycotics. They also have an additive anti-muscarinic action with other anti muscarinic drugs, such as atropine and antidepressant
The most common adverse effect is burning/stinging upon installation, which is mild and transient in nature.
A topical overdose of this ophthalmic solution may be flushed from the eye with warm tap water.
No clinical data on exposed pregnancies are available. The eye drops should only be used if the potential benefits outweigh the risks to the fetus or infant. It is not known whether the either of the active substances of the eye drop passes into breast milk. Caution should be exercised when using the product during breast-feeding.
The eye drop should be used with caution in elderly patients with severe cardiovascular disease, including arrhythmia, poorly controlled hypertension or diabetes.