Looking to expand your knowledge of antibiotics? Discover a fascinating list of medications that begin with the letter “I” and play a crucial role in fighting bacterial infections. From well-known treatments to lesser-known options, these antibiotics are essential tools in modern medicine. Let’s explore the world of “I” antibiotics and their impact on health!
1. Itraconazole

Itraconazole is an antifungal medication. It works by stopping the growth of fungi that cause infections in the body. It is not an antibiotic but is often used alongside antibiotics to treat fungal infections.
Health Benefits:
- Fights fungal infections
- Effective against athlete’s foot, ringworm, and toenail fungus
- Helps treat systemic fungal diseases
How to Take It:
- Capsules taken orally, usually once daily
- Follow doctor’s dosage, often between 200-400 mg per day
- Take with food for better absorption
Compatibility:
- Used for fungal infections that antibiotics cannot treat
- Works well with antifungal creams or topical treatments
- Usually not paired with antibiotics unless treating co-infections
2. Ivermectin

Ivermectin is mainly an antiparasitic medicine. It helps kill certain parasites that cause diseases like river blindness and strongyloidiasis. It also shows some antibacterial properties but is not primarily used as an antibiotic.
Health Benefits:
- Treats parasitic infections such as worms and mites
- Has some antimicrobial effects
- Used in controlling certain parasitic diseases globally
How to Take It:
- Orally in tablet form, usually a single dose or as prescribed
- Doses typically range from 150-200 mg depending on the condition
- Follow healthcare provider’s instructions carefully
Compatibility:
- Effective against parasitic infections, often combined with other antiparasitic agents
- Pairing with supportive treatments like probiotics may help gut health
- Not typically combined with antibiotics unless for co-infections
3. Imipenem

Imipenem is a powerful carbapenem-type antibiotic. It is used to treat serious bacterial infections by killing bacteria that cause pneumonia, urinary tract infections, and other severe infections. It is resistant to many bacteria that are resistant to other antibiotics.
Health Benefits:
- Highly effective against multidrug-resistant bacteria
- Treats severe infections like sepsis and complicated urinary infections
- Stops bacterial growth by breaking down their cell walls
How to Take It:
- Usually administered via injection or IV in hospitals
- Dosages vary based on infection severity, commonly 500 mg to 1 g every 8 hours
- Always take under medical supervision
Compatibility:
- Works with other antibiotics for complicated infections
- Effective when combined with cilastatin, which protects imipenem
- Not recommended to be paired with certain drugs; consult a doctor

Eleena Wills is a passionate health and wellness writer with over 5 years of experience in simplifying complex health topics for everyday readers. She holds a background in health communication and has contributed to multiple reputable wellness platforms. Eleena is committed to sharing science-backed tips on nutrition, mental well-being, fitness, and lifestyle habits that support long-term health. When she’s not writing, she’s experimenting with healthy recipes or practicing yoga.