Product Description

Here is a structured, easy-to-read summary of the provided information for **Zithrox (Azithromycin)**:

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### **1. Overview & Uses**

* **Drug Class:** Macrolide antibiotic.

* **Mechanism:** Blocks bacterial protein synthesis to stop the growth of susceptible microorganisms.

* **Common Indications:**

* **Lower Respiratory Tract:** Bronchitis, community-acquired pneumonia.

* **Upper Respiratory Tract:** Sinusitis, pharyngitis, tonsillitis.

* **Ears & Skin:** Otitis media (ear infections), skin and soft tissue infections.

* **Sexually Transmitted Infections (STIs):** Non-gonococcal urethritis and cervicitis caused by *Chlamydia trachomatis*.

* **Other:** Typhoid fever, pelvic inflammatory disease (PID).

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### **2. Dosage & Administration**

* **Adult Oral Dosage:**

* *Standard Course:* 500 mg once daily for 3 days **OR** 500 mg on Day 1, followed by 250 mg once daily on Days 2–5.

* *Chlamydia STIs:* 1 g as a single dose (or 500 mg on Day 1, then 250 mg daily for 2 days).

* **Pediatric Dosage (Oral):**

* *Over 6 months:* 10 mg/kg once daily for 3 days.

* *Weight-based dosing (3 days):*

* 15–25 kg: 200 mg daily

* 26–35 kg: 300 mg daily

* 36–45 kg: 400 mg daily

* **Intravenous (IV) Infusion:**

* Used for severe infections (e.g., pneumonia or PID) for 1–2 days, followed by oral therapy to complete a 7–10 day course as prescribed by a physician.

* **Administration Instructions:**

* Take **1 hour before or 2 hours after** meals.

* **Suspension Preparation:** Shake bottle $\rightarrow$ add boiled and cooled water to the mark line $\rightarrow$ shake well.

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### **3. Key Drug Interactions**

* **Antacids:** Separate doses by at least 1–2 hours to avoid reduced absorption.

* **Ergot Derivatives:** Co-administration is **contraindicated** (risk of ergotism).

* **Digoxin & Cyclosporin:** May increase plasma levels of these drugs; monitoring required.

* **Warfarin:** Monitor prothrombin time/INR if taken together.

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### **4. Contraindications & Precautions**

* **Contraindicated in:**

* Patients with known hypersensitivity to azithromycin or other macrolides.

* Patients with **hepatic (liver) disease** (liver is the main route of excretion).

* Co-administration with ergot derivatives.

* **Precautions:**

* **Renal Impairment:** Exercise caution in severe kidney impairment (creatinine clearance $<40 \text{ mL/min}$).

* **Allergic Reactions:** Rare severe reactions (angioedema, anaphylaxis) can occur and require immediate medical attention.

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### **5. Side Effects & Overdose**

* **Common/Mild Side Effects:** Nausea, vomiting, diarrhea/loose stools, abdominal pain, flatulence, heartburn.

* **Rare/Severe Side Effects:** Rash, photosensitivity, cholestatic jaundice, transient hearing impairment (with high/prolonged doses).

* **Overdose Symptoms:** Severe nausea, vomiting, diarrhea, and hearing loss. Treated with gastric lavage and supportive care.

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### **6. Pregnancy & Lactation**

* **Pregnancy:** Category B. Animal studies show no harm to the fetus, but it should only be used during pregnancy if clear alternatives are unavailable.

* **Lactation:** Unknown if excreted in breast milk; use with caution in nursing mothers.

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### **7. Storage & General Tips**

* **Storage:** Keep in a dry place away from heat and direct light. Keep out of reach of children.

* **Important Patient Advice:**

* Always complete the full course of therapy to prevent antibiotic resistance.

* Do not take antacids within 2 hours of taking this medication.

* Contact a doctor if diarrhea is severe/bloody or if symptoms do not improve after 3 days.

*(Note: Always consume medication as advised by a registered physician.)*