1. Clinical Overview
A fixed-dose combination of a broad-spectrum tetracycline antibiotic (Doxycycline) and a proteolytic enzyme derived from pineapple stems (Bromelain). The combination is primarily used for its enhanced anti-inflammatory and anti-infective properties, particularly in conditions involving tissue edema and inflammation.
| Onset | Duration | Bioavailability |
|---|---|---|
| NA | NA | NA |
2. Mechanism of Action
Doxycycline binds to the 30S ribosomal subunit of susceptible bacteria, inhibiting protein synthesis. It is bacteriostatic. Bromelain is a mixture of proteolytic enzymes (sulfhydryl proteases) that digest inflammatory proteins, reduce bradykinin levels, decrease prostaglandin synthesis, and improve microcirculation by breaking down fibrin clots. The combination may enhance tissue permeability, allowing better distribution of doxycycline, while simultaneously reducing inflammation and edema at the infection site.
3. Indications & Uses
- Sinusitis
- Chronic Obstructive Pulmonary Disease (COPD) exacerbations with infection
- Soft tissue infections with significant inflammation (e.g., cellulitis, abscesses)
- Dental infections (e.g., periodontitis, pericoronitis)
- Post-surgical inflammatory states and edema
4. Dosage & Administration
Adult Dosage: One tablet (Doxycycline 100mg + Bromelain 100mg) twice daily, usually for 5-10 days as per infection severity. May be taken with food to reduce GI upset.
Administration: Take with a full glass of water. Administer in an upright position and do not lie down immediately after to prevent esophageal irritation. Can be taken with food if GI upset occurs, but avoid dairy products, antacids, or iron supplements within 2-3 hours as they impair doxycycline absorption.
5. Side Effects
Common side effects may include:
- Nausea, vomiting, diarrhea
- Epigastric discomfort
- Photosensitivity (increased risk of sunburn)
- Esophageal irritation
- Mild allergic skin reactions
6. Drug Interactions
| Drug | Effect | Severity |
|---|---|---|
| Antacids, Calcium, Iron, Magnesium, Zinc supplements | Chelation reduces absorption of doxycycline. | Major |
| Warfarin and other anticoagulants | Both doxycycline and bromelain may potentiate anticoagulant effect, increasing bleeding risk. | Major |
| Penicillins (e.g., Amoxicillin) | Doxycycline may antagonize the bactericidal action of penicillins. | Moderate |
| Oral Contraceptives | Doxycycline may reduce efficacy, leading to contraceptive failure. | Moderate |
| Methotrexate | Increased risk of methotrexate toxicity. | Major |
7. Patient Counselling
8. Toxicology & Storage
Overdose: Seek immediate medical attention.
Storage: Store in a cool, dry place.