Halomycetin (Chloramphenicol)

Halomycetin is used as a topical antibacterial agent for eye infections caused by susceptible organisms.

• Bacterial conjunctivitis, including acute and chronic forms
• Keratitis and corneal ulceration due to susceptible bacteria
• Post‑operative prophylaxis after ocular surgery
• External ocular infections such as blepharitis and dacryocystitis
• Adjunctive therapy for mixed bacterial‑viral eye conditions when bacterial involvement is confirmed

Side effects of Halomycetin are generally mild but can vary in severity.

Common

• Temporary eye irritation or burning sensation after instillation
• Redness of the conjunctiva or eyelids
• Increased tearing or watery discharge
• Mild blurred vision that resolves quickly
• Sensation of a foreign body in the eye
• Mild eyelid swelling

Serious

• Allergic reactions including rash, itching, or swelling of the eyelids
• Stevens‑Johnson syndrome or toxic epidermal necrolysis involving the ocular surface
• Severe eye pain or loss of vision
• Marked swelling of the conjunctiva (chemosis)
• Systemic toxicity such as bone‑marrow suppression (rare with topical use)
• Persistent ulceration or corneal perforation

When using Halomycetin, certain precautions should be observed to ensure safety and effectiveness.

• Confirm bacterial susceptibility before initiating therapy
• Avoid use in patients with known hypersensitivity to chloramphenicol or other amphenicols
• Do not use if the eye drop solution is cloudy, discolored, or past its expiration date
• Use with caution in pregnant or breastfeeding individuals; consult a healthcare professional
• Monitor for signs of systemic absorption, especially with prolonged use or large doses
• Discontinue and seek medical advice if severe irritation, allergic reaction, or worsening of infection occurs
• Keep the container tightly closed and store at room temperature away from direct sunlight

Halomycetin may interact with other ophthalmic products or systemic medications.

Avoid

• Concurrent use of other topical antibiotics that may cause additive toxicity
• Use with ophthalmic corticosteroids unless directed by a physician, as steroids can mask infection signs
• Application of contact lenses immediately after instillation; remove lenses before use

Use with caution

• Systemic chloramphenicol therapy, due to potential additive bone‑marrow effects
• Antifungal eye drops, as combined use may affect ocular flora balance
• Medications that cause ocular dryness, which could increase irritation risk
• Any drug that may impair wound healing in the eye, such as certain chemotherapeutic agents