alfadox 100mg capsule - Doxycycline (100mg) medicine

alfadox 100mg capsule

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🏭 Betamax Remedies 📦 Varies by brand 💊 Allopathy 📅 Updated: Sep 21, 2026
📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Reviewed by
SaathiMed Expert Panel | Sep 21, 2026

What is alfadox 100mg capsule used for?

This medicine contains Doxycycline (100mg) and is used to treat ANTI INFECTIVES. Inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit, preventing addition of. Always consult your doctor before use.

  • Generic Name: Doxycycline
  • Manufacturer: Betamax Remedies
  • Form: Allopathy
  • Pregnancy Category: Category A
  • Prescription Required: Yes
💡 Did You Know? Over 80% of the antiretroviral drugs used globally to combat AIDS are supplied by Indian pharmaceutical companies.

💊 alfadox 100mg capsule Uses & Benefits

Treatment of infections caused by susceptible bacteria: respiratory tract infections, urinary tract infections, skin infections, acne, rosacea, sexually transmitted infections (e.g., chlamydia, gonorrhea), Lyme disease, anthrax, malaria prophylaxis, and others.

Off-label uses: Sclerosing agent for pleural effusions; treatment of rheumatoid arthritis (uncommon).

📋 Drug Information

Generic Name(s)Doxycycline
Brand NameDoxid 100mg Capsule
ManufacturerBetamax Remedies
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassANTI INFECTIVES
Action ClassTetracyclines
Route of AdministrationOral
StorageStore at room temperature (20-25°C), protect from light and moisture.
Shelf LifeAs per manufacturer

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionWell absorbed after oral administration; absorption is not significantly affected by food.
DistributionWidely distributed into tissues and body fluids; crosses placenta and enters breast milk.
Protein BindingApproximately 80-90% bound to plasma proteins.
MetabolismPartially metabolized in the liver.
Half-Life18-22 hours (single dose); may be shorter with repeated doses.
ExcretionExcreted primarily in feces via bile, and also in urine (about 40% unchanged).
BioavailabilityApproximately 90-100% after oral administration.
Onset of Action1-2 hours after oral administration.
Peak Plasma Time2-4 hours after oral administration.
Duration of Action12-24 hours.

How It Works

Inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit, preventing addition of amino acids to growing peptide chains.

Mechanism Steps

1Doxycycline enters bacterial cells via passive diffusion and active transport.
2Binds reversibly to the 30S ribosomal subunit.
3Prevents binding of aminoacyl-tRNA to the mRNA-ribosome complex.
4Inhibits peptide chain elongation, thereby blocking protein synthesis.
5Bacteriostatic effect: inhibits bacterial growth, allowing host immune system to clear infection.

💡 How to Take alfadox 100mg capsule

Follow your doctor's prescription exactly.

⚠️ Side Effects of alfadox 100mg capsule

✅ Common Side Effects

Nausea
Vomiting
Diarrhea
Photosensitivity
Esophageal irritation
Dyspepsia

🚨 Serious Side Effects

Pseudomembranous colitis
Stevens-Johnson syndrome
Intracranial hypertension
Hepatotoxicity
Anaphylaxis

⚠️ Rare Side Effects

Blood dyscrasias
Pancreatitis
Thyroid discoloration
Permanent teeth discoloration (in children)

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Warfarin Major Increased bleeding risk
Oral contraceptives Major Reduced contraceptive efficacy
Penicillins Major Antagonistic effect
Antacids (Al, Ca, Mg) Major Reduced doxycycline absorption
Iron supplements Major Reduced doxycycline absorption
Bismuth subsalicylate Major Reduced doxycycline absorption
Barbiturates Moderate Reduced doxycycline half-life
Carbamazepine Moderate Reduced doxycycline half-life
Phenytoin Moderate Reduced doxycycline half-life
Methoxyflurane Moderate Increased nephrotoxicity risk
Retinoids Moderate Increased intracranial pressure risk
Digoxin Minor Possible increased digoxin levels
Lithium Minor Possible increased lithium levels
Methotrexate Minor Possible increased methotrexate toxicity
Theophylline Minor Possible increased theophylline levels

🚨 Major Interactions

  • Warfarin
  • Oral contraceptives
  • Penicillins
  • Antacids containing aluminum, calcium, magnesium
  • Iron supplements
  • Bismuth subsalicylate

⚡ Moderate Interactions

  • Barbiturates
  • Carbamazepine
  • Phenytoin
  • Methoxyflurane
  • Retinoids

🍷 Alcohol Interaction

No direct interaction, but alcohol may worsen GI side effects.

🛡️ Safety & Warnings

🚫 Contraindications

Hypersensitivity to doxycycline or any tetracycline; pregnancy; children under 8 years (except for anthrax or other serious infections).

🤱 Lactation Safety

Excreted in breast milk; caution advised, may cause teeth discoloration in nursing infants.

💊 Overdose Management

Gastric lavage if recent; supportive care; no specific antidote.

⏰ Missed Dose

Take as soon as remembered; if near next dose, skip missed dose and resume regular schedule; do not double dose.

🔄 Substitutes for alfadox 100mg capsule

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

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