I-Guard 0.5% is a broad-spectrum antimicrobial preparation used in ophthalmic, otic, and systemic bacterial infections. It belongs to the macrolide group of antibiotics and is effective against a wide range of gram-positive, gram-negative, and anaerobic organisms. Due to its extensive antimicrobial coverage, I-Guard 0.5% plays a significant role in the management of severe and life-threatening infections as well as localized eye and ear infections.

রেজিস্টার্ড চিকিৎসকের পরামর্শ অনুযায়ী ঔষধ সেবন করুন

Therapeutic Class

• Ear Anti-Infectives & Antiseptics

• Eye Anti-Infectives & Antiseptics

• Macrolide Antibiotics

Indications

I-Guard 0.5% is indicated for the treatment of a wide variety of infections, including:

• Ocular infections

• Otitis externa

• Bacterial meningitis

• Anaerobic bacterial infections

• Anthrax

• Brain abscess

• Ehrlichiosis

• Gas gangrene

• Granuloma inguinale

• Infections caused by Haemophilus influenzae

• Listeriosis

• Plague

• Psittacosis

• Q fever

• Severe gastroenteritis

• Severe melioidosis

• Severe systemic infections caused by Campylobacter fetus

• Tularemia

• Whipple’s disease

Pharmacology

I-Guard 0.5% exerts its antibacterial effect by inhibiting bacterial protein synthesis. It binds to the 50S subunit of the bacterial ribosome, thereby preventing peptide bond formation through inhibition of peptidyl transferase. This action suppresses bacterial growth and replication. Depending on the organism and concentration achieved at the site of infection, I-Guard 0.5% may exhibit both bacteriostatic and bactericidal activity. It is particularly active against H. influenzae, Neisseria meningitidis, and Streptococcus pneumoniae.

Dosage & Administration

Ophthalmic Use:

• Adults, children, and infants: Instill 1–2 drops into the affected eye(s) 4–6 times daily.

• The frequency may be increased if necessary.

• Treatment usually continues for approximately 7 days and should not exceed 3 weeks without medical re-evaluation.

Otic Use:

• Instill 2–3 drops into the ear canal three to four times daily.

• For otitis externa: 2–3 drops into the ear twice to three times daily.

Oral Use (Systemic Infections):

• Adults: 50 mg/kg/day in four divided doses, increased to 100 mg/kg/day in severe infections or meningitis.

• Children: 50 mg/kg/day in four divided doses, increased to 100 mg/kg/day in severe infections.

• Neonates: Dose adjustments based on age and weight are required.

  রেজিস্টার্ড চিকিৎসকের পরামর্শ অনুযায়ী ঔষধ সেবন করুন

Drug Interactions

• Reduced efficacy with phenobarbitone and rifampicin

• Decreased absorption of iron and vitamin B12 in anemic patients

• May impair the effectiveness of oral contraceptives

Contraindications

• Hypersensitivity to the drug

• Pregnancy and lactation

• Porphyria

• Pre-existing bone marrow depression or blood dyscrasias

Side Effects

• Gastrointestinal disturbances

• Neurological effects such as headache, confusion, or encephalopathy

• Hemolysis in patients with G6PD deficiency

• Hypersensitivity reactions with ophthalmic use

• Ototoxicity with ear drops

Pregnancy & Lactation

Pregnancy Category C. I-Guard 0.5% should be used only when the potential benefits outweigh the possible risks to the fetus.

Storage Conditions

• Capsules/suspensions: Store below 30°C

• Ophthalmic and otic preparations: Store at 2–8°C

• Do not freeze and protect from light.