Common use
Combigan is a combination eye drop solution prescribed to lower elevated intraocular pressure in patients with open-angle glaucoma or ocular hypertension. This dual-action glaucoma treatment combines two proven active ingredients: brimonidine tartrate, a selective alpha-2 adrenergic agonist, and timolol maleate, a non-selective beta-blocker. Together, these combination eye drops work through complementary mechanisms — brimonidine reduces aqueous humor production while simultaneously increasing uveoscleral outflow, and timolol further decreases fluid production in the eye. When you buy Combigan online, you receive a convenient single-bottle solution that replaces the need for two separate medications, improving adherence and simplifying your glaucoma treatment regimen.

Dosage and direction
Instill one drop of Combigan in the affected eye(s) twice daily, approximately 12 hours apart, typically in the morning and evening. Use the drops exactly as prescribed by your ophthalmologist, and do not exceed the recommended dosage. Avoid touching the dropper tip to the eye, fingers, or any surface to prevent contamination. If you wear contact lenses, remove them before applying brimonidine timolol eye drops and wait at least 15 minutes before reinserting. When using additional eye medications for glaucoma treatment, space each drop at least 5–10 minutes apart to allow proper absorption of each medication.

Precautions
Inform your doctor about your complete medical history before starting Combigan, especially if you have heart conditions (such as heart failure, bradycardia, or heart block), asthma, chronic obstructive pulmonary disease, diabetes, thyroid disorders, depression, or circulation problems such as Raynaud’s disease. The timolol component of these combination eye drops may cause drowsiness, fatigue, or blurred vision, so exercise caution during activities that require mental alertness, such as driving or operating heavy machinery. Patients with diabetes should be aware that beta-blockers can mask the symptoms of low blood sugar. Regular monitoring of intraocular pressure, heart rate, and respiratory function is recommended during long-term treatment.

Contraindications
Do not use Combigan if you have bronchial asthma, a history of asthma, or severe chronic obstructive pulmonary disease (COPD), as the timolol component may trigger bronchospasm. This medication is also contraindicated in patients with sinus bradycardia (slow heart rate), second- or third-degree heart block, overt cardiac failure, or cardiogenic shock. Avoid use if you are allergic to brimonidine, timolol, other beta-blockers, or any inactive ingredients in the formulation. Combigan is not recommended for infants and neonates. Buy Combigan generic versions only from verified pharmacies to ensure safety and efficacy.

Possible side effect
Common side effects of brimonidine timolol combination eye drops include mild eye discomfort or stinging upon application, eye redness, dry mouth, drowsiness, fatigue, and headache. Some patients may experience blurred vision, eye itching, or tearing. Serious side effects that require immediate medical attention include unusually slow heart rate, difficulty breathing, wheezing, severe dizziness or fainting, swelling of the ankles or feet, sudden weight gain, and severe allergic reactions such as rash, hives, or swelling of the face, lips, or throat. Contact your doctor promptly if you experience any persistent or worsening side effects during ocular hypertension treatment.

Drug interaction
Combigan may interact with several classes of medications. The brimonidine component can interact with monoamine oxidase (MAO) inhibitors, tricyclic antidepressants, and central nervous system depressants. The timolol component may interact with other beta-blockers (oral or topical), calcium channel blockers, cardiac glycosides, and antiarrhythmic agents. Blood pressure medications, including ACE inhibitors and other antihypertensives, may have enhanced effects when used alongside Combigan. Always inform your doctor about all medications, supplements, and herbal products you are currently taking to avoid potentially dangerous interactions.

Missed dose
If a dose is missed, apply Combigan as soon as you remember. If it is close to the next scheduled dose, skip the missed one and continue with your regular twice-daily dosing schedule. Do not double the dose to compensate, as this may increase the risk of side effects including low blood pressure and slow heart rate.

Overdose
Overdose of Combigan may cause dangerously low blood pressure, severe bradycardia (slow heart rate), dizziness, respiratory depression, or loss of consciousness, particularly in children who are especially sensitive to the effects of brimonidine. In case of accidental ingestion or suspected overdose, seek emergency medical help immediately. Symptomatic and supportive treatment should be provided under medical supervision.

Storage
Store Combigan eye drops at room temperature between 15–25°C (59–77°F), protected from heat and direct light. Keep the bottle tightly closed when not in use and discard any remaining solution after the expiration date. Keep all glaucoma medications out of reach of children and pets.

Disclaimer

We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis. Any specific instructions for a particular patient should be agreed with your health care adviser or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.