Prescription drug · ANDA
Diphenhydramine Hydrochloride NDC 42571-511
Diphenhydramine hydrochloride 50 mg/mL · Injection · Intramuscular, Intravenous · Micro Labs Limited
NDC codes
FDA NDC Directory| Package NDC | 11-digit (billing) | Package | Copy |
|---|---|---|---|
| 42571-511-56 | 4257105115642571051156 | 1 VIAL, GLASS in 1 CARTON (42571-511-56) / 10 mL in 1 VIAL, GLASSMarketed from Nov 1, 2025 |
How the 11-digit form is made: The product segment has 3 digits, so one leading zero is added to it (5-3-2 → 5-4-2). Formatting the NDC does not by itself make it billable — the product, package and quantity must match what was dispensed or administered, and payer rules apply. Conversion rules
Product information
- Brand name (proprietary)
- Diphenhydramine Hydrochloride
- Generic name (nonproprietary)
- diphenhydramine hydrochloride
- Active ingredients
- Diphenhydramine hydrochloride — 50 mg/mL
- Dosage form
- Injection
- Route
- Intramuscular, Intravenous
- Labeler
- Micro Labs LimitedNDC labeler code 42571
- Product type
- Prescription drug
- Marketing category
- ANDA — Abbreviated New Drug Application (generic)Application ANDA 219845
- Marketing start
- Listing expires
- Other FDA classes
- Histamine H1 Receptor Antagonists (Mechanism)
- Identifiers
- Product ID 42571-511_3d083da4-429e-73c5-e063-6394a90ad2c1SPL ID 3d083da4-429e-73c5-e063-6394a90ad2c1SPL set ID c2981222-1671-4ecd-a5a2-286f0663f1aeRxCUI 1049633UNII TC2D6JAD40UPC 0342571511562
- Pharmacologic class
- Histamine-1 Receptor Antagonist
Billing references
What Med-Code can say about coding this product, and where each statement comes from. Nothing here is inferred from the name alone.
- HCPCS codeNo match
No drug-specific HCPCS code in Med-Code's directory for this product. The directory is curated and not complete — check the current CMS HCPCS file before billing.
- Administration
Drug administration (CPT 96360–96549)
When a clinician administers the drug, the administration is reported separately. Codes in this range cover hydration, therapeutic injections and infusions, and chemotherapy or other complex drug administration. The right code depends on route, duration and drug type, and self-administered drugs are not billed this way.
- NDC on a medical claim
N442571051156followed by a unit qualifier and the quantityPackage 42571-0511-56. Unit qualifiers: F2 (international unit), GR (gram), ME (milligram), ML (milliliter), UN (unit (each)). The qualifier and quantity depend on what was given. About the N4 qualifier
Product label
Current FDA label (SPL), effective .
Indications (excerpt from the label)
INDICATIONS AND USAGE Diphenhydramine hydrochloride injection, is effective in adults and pediatric patients, other than premature infants and neonates, for the following conditions when diphenhydramine hydrochloride in the oral form is impractical. Antihistaminic For amelioration of allergic reactions to blood or plasma, in anaphylaxis as an adjunct to epinephrine and other standard measures after the acute symptoms have been controlled, and for other uncomplicated allergic conditions of the immediate type when oral therapy is impossible or contraindicated. Motion sickness For active treatment of motion sickness. Antiparkinsonism For use in parkinsonism, when oral therapy is impossible or c…
Excerpt only. Read the full label for complete information.
About NDC 42571-511
- What is NDC 42571-511?
- 42571-511 is the product NDC for Diphenhydramine Hydrochloride, Diphenhydramine hydrochloride 50 mg/mL injection, listed with the FDA by Micro Labs Limited. It has 1 package NDC, shown above in 10- and 11-digit form.
- What drug is associated with this NDC?
- Diphenhydramine Hydrochloride.
- What is the active ingredient?
- Diphenhydramine hydrochloride.
- Who is the labeler?
- Micro Labs Limited, NDC labeler code 42571. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.
- What other NDCs exist for Diphenhydramine Hydrochloride?
- 80 other product NDCs are listed under this name. See all Diphenhydramine Hydrochloride NDCs.
- Is there a related HCPCS / J-code?
- Not in Med-Code's curated HCPCS directory. See Billing references above.
Related NDCs: other Diphenhydramine Hydrochloride products
Other finished products listed under the same name: strengths, forms and labelers.
| Product | Strength | Form · route | Labeler | Product NDC | Package NDCs (11-digit) |
|---|---|---|---|---|---|
| Diphenhydramine Hydrochloride | Diphenhydramine hydrochloride 25 mg/1 | TabletOral | Cardinal Health 107, LLC | 55154-1589 | 55154-1589-00 |
| Diphenhydramine Hydrochloride | Diphenhydramine hydrochloride 25 mg/1 | Tablet, Film coatedOral | Health Pharma USA LLC | 71679-308 | 71679-0308-00 |
| Diphenhydramine hydrochloride | Diphenhydramine hydrochloride 12.5 mg/5mL | SolutionOral | Camber Pharmaceuticals, Inc. | 31722-600 | 31722-0600-1131722-0600-31 |
| Diphenhydramine hydrochloride | Diphenhydramine hydrochloride 25 mg/10mL | SolutionOral | Camber Pharmaceuticals, Inc. | 31722-601 | 31722-0601-31 |
| Diphenhydramine Hydrochloride | Diphenhydramine hydrochloride 50 mg/mL | InjectionIntramuscular, Intravenous | REMEDYREPACK INC. | 70518-4536 | 70518-4536-00 |
| Diphenhydramine Hydrochloride | Diphenhydramine hydrochloride 50 mg/mL | InjectionIntramuscular, Intravenous | Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc. | 23155-263 | 23155-0263-31 |
| Diphenhydramine hydrochloride | Diphenhydramine hydrochloride 50 mg/mL | InjectionIntramuscular, Intravenous | REMEDYREPACK INC. | 70518-4455 | 70518-4455-00 |
| Diphenhydramine Hydrochloride | Diphenhydramine hydrochloride 50 mg/1 | Capsule, Liquid filledOral | Prodose, Inc. | 68210-5057 | 68210-5057-01 |
| Diphenhydramine Hydrochloride | Diphenhydramine hydrochloride 50 mg/mL | InjectionIntramuscular, Intravenous | Medical Purchasing Solutions, LLC | 71872-7373 | 71872-7373-01 |
| Diphenhydramine Hydrochloride | Diphenhydramine hydrochloride 50 mg/mL | InjectionIntramuscular, Intravenous | Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc. | 23155-264 | 23155-0264-41 |