Tobramet (dexamethasone + tobramycin): Uses, Dosage & Side Effects

What it's for (Indications)

Steroid-responsive inflammatory ocular conditions for which a corticosteroid is indicated and where superficial bacterial ocular infection or a risk of bacterial ocular infection exists.
This may include conditions like bacterial conjunctivitis, keratitis, and other anterior segment inflammations.

Dosage Information

Type	Guideline
Standard	Use as recommended by your doctor. Typically, instill 1 to 2 drops into the conjunctival sac of the affected eye(s) every 4 to 6 hours. During the initial 24 to 48 hours, the dosage may be increased to 1 to 2 drops every 2 hours. Dosage should be tapered gradually as improvement occurs. It is crucial to complete the entire prescribed course of medication to prevent recurrence of infection.

Safety & Warnings

Common Side Effects

Slight discomfort, temporary blurred vision, watering of the eyes, corneal thinning, cataract formation, secondary fungal infection, and elevated intraocular pressure.
If these symptoms persist or worsen, medical consultation is advised.

Serious Warnings

Black Box Warning: None
Patients currently taking steroids should consult their doctor before using this medicine.
Patients with serious eye diseases or vision problems should inform their doctor prior to starting treatment.
Prolonged use of corticosteroids may lead to posterior subcapsular cataracts, glaucoma, and may enhance secondary ocular infections (bacterial, fungal, or viral); fungal infection of the cornea is particularly prone to develop with prolonged steroid application.
Caution is advised when driving or operating machinery immediately after administration due to the potential for temporary blurred vision.
For pregnant females, there is no definite data regarding use; consultation with a doctor is advised.
Caution is advised in patients with renal or hepatic impairment, chickenpox, measles, myasthenia gravis, epilepsy, or congestive heart failure (these precautions are typically more relevant for systemic corticosteroid use due to minimal systemic absorption with ophthalmic administration).
Alcohol is prohibited as per local guidelines; however, systemic absorption from ophthalmic use is generally minimal.
Gradual withdrawal may be necessary for systemic administration, but is less relevant for topical ophthalmic use unless significant systemic absorption occurs.

How it Works (Mechanism of Action)

Dexamethasone, a potent synthetic corticosteroid, exerts anti-inflammatory effects by inhibiting phospholipase A2, thereby reducing the production of inflammatory mediators. Tobramycin is an aminoglycoside antibiotic that inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit, leading to misreading of the mRNA and subsequent inhibition of bacterial growth.