What is the recommended medication and prescription instructions (sig) for treating this eye infection?

Recommended Medication and Prescription Instructions for Eye Infection

For herpes simplex virus (HSV) conjunctivitis, prescribe topical ganciclovir 0.15% gel three to five times daily, which is less toxic to the ocular surface than trifluridine, or add oral acyclovir 400 mg five times daily for 7 days if topical therapy alone is inadequate. 1

Treatment Algorithm Based on Viral Etiology

HSV Conjunctivitis

Topical Options:

• Ganciclovir 0.15% gel: Apply 3-5 times daily (preferred due to lower ocular surface toxicity) 1
• Trifluridine 1% solution: 5-8 times daily (causes inevitable epithelial toxicity if used >2 weeks, so avoid prolonged use) 1

Oral Options (add if topical alone insufficient):

• Acyclovir 400 mg PO five times daily for 7 days 1
• Valacyclovir 500 mg PO 2-3 times daily 1
• Famciclovir 250 mg PO twice daily 1

Critical Caveat: Topical antivirals alone may not prevent progression of HSV blepharoconjunctivitis—combination with oral antivirals is more effective. 1 Never use topical corticosteroids as they potentiate HSV epithelial infections. 1

Varicella Zoster Virus (VZV) Conjunctivitis

For persistent or recalcitrant disease in immunocompetent patients:

• Acyclovir 800 mg PO five times daily for 7 days, OR 1
• Valacyclovir 1000 mg PO every 8 hours for 7 days, OR 1
• Famciclovir 500 mg PO three times daily for 7 days 1

Note: Topical antivirals alone are not helpful for VZV conjunctivitis but may be added in unresponsive cases. 1 Consider topical antibiotics to prevent secondary bacterial infection of necrotic vesicles. 1

Adenoviral Conjunctivitis Management

If subepithelial infiltrates develop (typically ≥1 week after onset):

• Mild cases: Observation only 1
• Symptomatic cases with blurring/photophobia: Consider low-dose topical corticosteroids (fluorometholone or loteprednol preferred to minimize IOP elevation and cataract risk), tapered to minimum effective dose 1
• Alternative: Cyclosporine 0.05% to 1% drops can reduce infiltrates 1

Follow-Up Schedule

• Within 1 week for HSV patients: Check visual acuity and perform slit-lamp biomicroscopy 1
• At 2-3 weeks for untreated viral conjunctivitis: Evaluate if symptoms persist (red eye, pain, decreased vision) 1
• Regular monitoring for corticosteroid users: Check IOP, visual acuity, and slit-lamp exam to detect steroid-induced complications 1

Special Populations

Neonates with HSV: Require immediate pediatrician consultation—systemic HSV infection is life-threatening. 1