Lidocaine Hydrochloride 0.4 % with Dextrose 5 % (often called “Lidocaine + D5” or “Lidocaine D5” in plastic bags) is a ready‑to‑use injectable solution that combines a local anesthetic (lidocaine) with a 5 % dextrose (glucose) carrier. It is commonly supplied in single‑use plastic syringes or vials (often 2 mL or 5 mL) for outpatient or intra‑operative use.
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1. Composition & Physical Properties
| Component | Concentration | Typical Volume in a Single‑Use Container |
|-----------|---------------|----------------------------------------|
| Lidocaine hydrochloride | 0.4 % (4 mg/mL) | 2 mL → 8 mg total |
| Dextrose (glucose) | 5 % (50 mg/mL) | 2 mL → 100 mg total |
| Saline (NaCl 0.9 %) | 0.9 % | 1 mL (for isotonicity) |
| pH (adjusted) | ~5.5–6.5 | – |
| Container | Sterile, single‑use plastic | – |
The solution is isotonic and clear, usually labeled “Lidocaine 0.4 % + D5” or “Lidocaine 0.4 % + 5 % Dextrose”.
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2. Indications
1. Local Anesthesia
- Topical or infiltration for minor surgical, dental, or dermatologic procedures.
- Used when a low‑concentration lidocaine solution is preferred (e.g., in patients with risk of systemic toxicity).
2. Intra‑operative Use
- As a “saline‑like” anesthetic for superficial tissues in outpatient procedures (e.g., suturing, excisions, biopsies).
3. Intravenous (IV) Use
- Occasionally used in high‑dose infusion for analgesia or anti‑arrhythmic purposes (e.g., lidocaine for ventricular arrhythmias).
- The dextrose provides an osmotic stabilizer and prevents lidocaine crystallization in the IV line.
4. Anesthetic in Hematologic/Oncologic Procedures
- Intra‑venous lidocaine in dextrose can be used for procedures requiring a “neutral” solution that does not interfere with blood tests.
Always follow local institutional protocols and regulatory approvals when using for IV indications.
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3. Typical Dosage & Administration
| Context | Typical Dose (per 2 mL) | Notes |
|---------|------------------------|-------|
| Topical/Local infiltration | 2 mL (8 mg lidocaine) | Use for small, superficial lesions. |
| Intra‑operative infiltration | 2–5 mL (8–20 mg lidocaine) | Adjust to procedural length and depth. |
| IV infusion | 1–4 mg/kg over 10–20 min | For anti‑arrhythmic therapy. Monitor cardiac function. |
| IV analgesia | 1–2 mg/kg as bolus | For acute pain; adjust per response. |
Key Points
• Maximum daily lidocaine dose (without epi) is 4.5 mg/kg; with epinephrine, up to 7 mg/kg.
• Do not exceed 2 mg/kg in patients with hepatic impairment or on chronic lidocaine therapy.
• For IV use, a slow infusion (≤ 20 min) limits peak plasma concentration.
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4. Contraindications & Precautions
| Category | Key Concerns |
|----------|-------------|
| Contraindications | • Known hypersensitivity to lidocaine or any excipient.
• Severe hepatic or renal dysfunction (due to lidocaine metabolism).
• Severe cardiac arrhythmias or prolonged QT interval (lidocaine may worsen). |
| Precautions | • Monitor for signs of systemic toxicity (tingling, circumoral numbness, tinnitus).
• Use in patients with glucose‑6‑phosphate dehydrogenase (G6PD) deficiency is generally safe, but monitor for hemolysis if large dextrose loads. |
| Drug Interactions | • CYP1A2 inhibitors/inducers (e.g., ciprofloxacin, carbamazepine).
• Other anti‑arrhythmic agents (quinidine, procainamide).
• Drugs prolonging QT (e.g., certain antipsychotics). |
| Special Populations | • Pregnancy: Category B – use only if benefits outweigh risks.
• Breastfeeding: minimal transfer; lactation generally safe.
• Pediatric: dose adjustments per weight; monitor for apnea. |
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5. Adverse Reactions
| Reaction | Incidence | Typical Management |
|----------|-----------|--------------------|
| Local (pain, burning, pruritus) | 5–10 % | Reduce injection volume; use lower concentration if necessary. |
| Systemic (hypotension, bradycardia, seizures) | < 1 % | Immediate cessation, supportive care (airway, BVM ventilation), administer benzodiazepines for seizures. |
| Allergic (rash, urticaria, anaphylaxis) | Rare | Treat with antihistamines, epinephrine if anaphylaxis. |
| Metabolic (hypoglycemia) | Rare | Monitor glucose in patients at risk (diabetics). |
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6. Storage & Compatibility
| Parameter | Recommendation |
|-----------|----------------|
| Temperature | 2–8 °C (refrigerated) until first use; can be stored at room temperature (up to 25 °C) for 24 h post‑opening. |
| Light | Protect from direct sunlight; store in opaque container. |
| Container | Single‑use plastic vials/syringes. Do not transfer into glass or metal containers (risk of contamination or reaction). |
| Shelf Life | 2–3 months after opening if stored under recommended conditions. |
| IV Compatibility | Compatible with normal saline, 5 % dextrose, and most isotonic crystalloids. Avoid mixing with hypertonic solutions or high‑concentration glucose (may cause precipitation). |
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7. Practical Tips for Clinicians
1. Labeling – Always include patient name, dose, and time on the label.
2. Check for Interference – Dextrose can affect laboratory tests (e.g., glucose, electrolytes). Use a separate tube if lab work is needed immediately after IV infusion.
3. IV Site Care – Use a dedicated infusion set; change tubing at least every 8 h to reduce contamination risk.
4. Pain Management – If patients experience pain at the injection site, consider adding a small amount of epinephrine (0.1 % v/v) to prolong action and reduce systemic absorption.
5. Documentation – Record total lidocaine dose, any adverse events, and patient response.
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8. Quick Reference Sheet
<br />
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| Lidocaine 0.4% + D5 (2 mL) – 8 mg Lidocaine |<br />
| ------------------------------------------- |<br />
| • Local anesthesia for minor procedures |<br />
| • IV anti‑arrhythmic: 1–4 mg/kg over 10–20 min |<br />
| • Max daily dose: 4.5 mg/kg (no epi) |<br />
| • Storage: 2–8 °C, protect from light |<br />
| • Contraindicated in: G6PD deficiency? (rare) |<br />
| ------------------------------------------- |<br />
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Bottom Line
Lidocaine 0.4 % with 5 % dextrose in a plastic vial is a versatile, low‑concentration anesthetic solution suitable for topical infiltration, intra‑operative use, and, when appropriately dosed, IV therapy. Adhere strictly to dosing guidelines, monitor for toxicity, and maintain proper storage conditions to ensure patient safety and product efficacy.
If you have a specific clinical scenario (e.g., dosing in pediatrics, use in a particular surgical procedure, or management of an adverse reaction), let me know and I can give more focused guidance!