Roxee Meds Catalog
Diphenhydramine
Medication catalog facts with explicit FDA-approval, off-label, source-limited, and safety context.
Veterinary professional?
Data freshness
Roxee is still reviewing source support for this medication profile.
Roxee has safety or ingredient evidence for this medication, but a regulatory product/application match is still pending.
openFDA reaction terms and case summaries are supporting evidence, not proof of causality.
Source timing details
-
Storefront facts:
Source Roxee
| Refreshed May 5, 2026, 10:05 AM UTC
The storefront fact projection used for browse cards and quick facts.
- openFDA reaction terms: Source FDA openFDA | Refreshed May 5, 2026, 10:04 AM UTC
- openFDA case summaries: Source FDA openFDA | Refreshed May 5, 2026, 10:04 AM UTC
Evidence
Reviewed / Updated / Sources
Reviewed by: Not available
Last reviewed: April 15, 2026
Updated: April 15, 2026, 10:04 AM UTC
- Medication contraindications · safety_warning
- openFDA case USA-USFDACVM-2025-US-075379 · adverse_reaction
- Structured Product Label · document
- Structured Product Label · document
- Structured Product Label · document
Diphenhydramine
Drug type: Generic ingredient • Generic profile • Not FDA-approved for animals
Species: Both
Approval status: Not FDA-approved as an animal drug. No FDA-approved animal-drug application is linked for this record. It may represent extra-label, human-drug, bulk-compounding, export-only, or otherwise unapproved animal-use source data; use only under veterinarian direction.
Medication Snapshot
Merged from the current Roxee medication system with field-level provenance, freshness, and completeness tracking.
Diphenhydramine
Antihistamine sometimes used for allergies/itching and mild allergic reactions; may cause mild sedation. Species commonly shown: Both.
Indications / Uses
Antihistamine sometimes used for allergies/itching and mild allergic reactions; may cause mild sedation.
Administration / How To Give
Oral
Storage
Store at room temperature.
Warnings / Contraindications
Use caution with glaucoma, urinary retention, or certain cardiac conditions.
- Use caution with glaucoma, urinary retention, or certain cardiac conditions.
Side Effects
Sedation, dry mouth, GI upset; occasional paradoxical excitement.
FAQ
Related Medications
Source Transparency
- Verified source: https://www.roxee.ai/meds/
- Verified source: https://animaldrugsatfda.fda.gov/adafda/views/#/search
- Verified source: https://animaldrugsatfda.fda.gov
- Verified source: https://api.fda.gov/animalandveterinary/event.json
- Verified source: /static/meds/images/diphenhydramine.jpg
- Verified source: https://www.accessdata.fda.gov/spl/data/17f7f435-dae1-48c5-8244-a097386821c2/17f7f435-dae1-48c5-8244-a097386821c2.xml
- Last refreshed: May 5, 2026, 10:05 a.m.
- Last verified: Apr 15, 2026, 10:04 a.m.
- Validation status: Incomplete
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Sign in to continuePet Owner Quick Guide
Start here first for the safest next-step summary before the deeper medication detail.
Used for:
Antihistamine sometimes used for allergies/itching and mild allergic reactions; may cause mild sedation.
Dosing note:
Exact dosing depends on your pet's species, weight, and health status. Use your veterinarian's instructions for the exact dose and schedule.
What to watch for:
- Use caution with glaucoma, urinary retention, or certain cardiac conditions
- Loss of appetite (1 reports)
- Hair loss (1 reports)
- Elevated globulins (1 reports)
When to call the vet:
- Repeated vomiting or diarrhea.
- Severe lethargy (hard to wake, very low energy).
- Collapse or fainting.
- Trouble breathing.
- Facial swelling or hives.
- Blood in vomit or stool.
What to tell or ask your vet today:
- Is this medicine the right fit for my pet’s current symptoms?
- Which warning signs mean I should call back right away?
- How should I handle missed doses or refusal to take the medicine?
Major cautions & emergency warning signs
Side effects to monitor:
- Use caution with glaucoma, urinary retention, or certain cardiac conditions
- Loss of appetite
- Hair loss
- Elevated globulins
Most reported reactions:
- Loss of appetite (1 reports)
- Hair loss (1 reports)
- Elevated globulins (1 reports)
Emergency warning signs:
- Repeated vomiting or diarrhea.
- Severe lethargy (hard to wake, very low energy).
- Collapse or fainting.
- Trouble breathing.
Quick Facts
Official label facts first, then secondary summaries. Marketing content is separated below.
Warnings / Contraindications
Use caution with glaucoma, urinary retention, or certain cardiac conditions.
- High: Use caution with glaucoma, urinary retention, or certain cardiac conditions.
- https://animaldrugsatfda.fda.gov · safety_warning · Medication contraindications
Adverse Reactions
Snapshot first, detailed rows second. This section summarizes signal data and is not a diagnosis.
Tap or hover a reaction to see what it means in plain language.
Grouped by Body System
Most Reported Reactions
| Reaction | Body system | Cases | Species | Serious cases |
|---|---|---|---|---|
| Digestive | 1 | Dog | 1 | |
| Skin & allergy | 1 | Dog | 1 | |
| Other | 1 | Cat | 1 | |
| Other | 1 | Cat | 1 | |
| Other | 1 | Cat | 1 | |
| Other | 1 | Cat | 1 | |
| Other | 1 | Dog | 1 | |
| Other | 1 | Cat | 1 |
Species coverage: Dog (17) Cat (15)
View detailed reaction table
| Reaction | Body system | Species | Seriousness | Frequency | Reports |
|---|---|---|---|---|---|
| Neurologic | Cat | Non-serious | - | 1 | |
| Digestive | Dog | Serious | - | 1 | |
| Skin & allergy | Dog | Serious | - | 1 | |
| Other | Cat | Serious | - | 1 | |
| Other | Cat | Serious | - | 1 | |
| Other | Cat | Serious | - | 1 | |
| Other | Cat | Serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Other | Cat | Non-serious | - | 1 | |
| Other | Cat | Serious | - | 1 | |
| Other | Cat | Serious | - | 1 | |
| Other | Cat | Serious | - | 1 | |
| Digestive | Dog | Non-serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Digestive | Cat | Non-serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Digestive | Cat | Serious | - | 1 | |
| Behavior | Dog | Serious | - | 1 | |
| Behavior | Cat | Non-serious | - | 1 | |
| Other | Cat | Serious | - | 1 | |
| Other | Dog | Non-serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Behavior | Dog | Non-serious | - | 1 | |
| Other | Dog | Serious | - | 1 | |
| Other | Cat | Serious | - | 1 | |
| Other | Cat | Serious | - | 1 |
- https://api.fda.gov/animalandveterinary/event.json · adverse_reaction · openFDA case USA-USFDACVM-2025-US-075379
Storage & Handling
Store at room temperature.
Documents
Owner handouts and official technical documents open on-page first, with the original source still one click away.
Owner handouts
0Official label / PI
0SPL
4FOI
0Vetadryl 30 SPL
SPL · Structured Product Label
Calmatrol SPL
SPL · Structured Product Label
Calmatrol SPL
SPL · Structured Product Label
Diphenhydramine HCL SPL
SPL · Structured Product Label
- https://www.accessdata.fda.gov/spl/data/f372f3a0-b460-495d-ade4-d30eb4ebcbba/f372f3a0-b460-495d-ade4-d30eb4ebcbba.xml · document · Structured Product Label
- https://www.accessdata.fda.gov/spl/data/c1ff051c-ceba-46dc-8411-5f710dae0e34/c1ff051c-ceba-46dc-8411-5f710dae0e34.xml · document · Structured Product Label
- https://www.accessdata.fda.gov/spl/data/81751193-2172-4a51-8910-42e91c14638f/81751193-2172-4a51-8910-42e91c14638f.xml · document · Structured Product Label
- https://www.accessdata.fda.gov/spl/data/17f7f435-dae1-48c5-8244-a097386821c2/17f7f435-dae1-48c5-8244-a097386821c2.xml · document · Structured Product Label
Veterinary reference (advanced)
Canonical medication sections are above. This legacy block remains available for deeper cross-reference without cluttering the primary workflow.
At a Glance
Quick facts and links to official labeling and safety signals.
-
Storefront facts:
Source Roxee
| Refreshed May 5, 2026, 10:05 AM UTC
The storefront fact projection used for browse cards and quick facts.
- openFDA reaction terms: Source FDA openFDA | Refreshed May 5, 2026, 10:04 AM UTC
- openFDA case summaries: Source FDA openFDA | Refreshed May 5, 2026, 10:04 AM UTC
Diagnosis-code mappings are not available for this medication yet.
Counseling and Monitoring Highlights
Global Pet owner/Vet mode is controlled in the header. This section avoids duplicate in-page persona tabs.
- Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Contraindication, High)
Identifiers & Packages
Normalized identifiers (NDC/NADA/ANADA) and package metadata from regulator listings.
| Package NDC | Product NDC | Form / Route | Status |
|---|---|---|---|
| 21091-695-01 | 21091 | - | |
| 43655-002-01 | 43655 | - | |
| 49427-329-45 | 49427 | - | |
| 49427-329-57 | 49427 | - | |
| 49427-330-45 | 49427 | - | |
| 49427-330-57 | 49427 | - | |
| 70782-200-08 | 70782 | - | |
| 70782-201-12 | 70782 | - | |
| 72087-021-10 | 72087 | - | |
| 72087-022-20 | 72087 | - | |
| 80547-116-50 | 80547 | - | |
| 80547-128-50 | 80547 | - |
Enriched Documents
Documents are tiered by source trust: Official, Clinical, Manufacturer, Marketing.
-
Vetadryl 30 SPL
• Structured Product Label • Official
FDA Structured Product Label from the electronic animal drug product listing directory.
-
Calmatrol SPL
• Structured Product Label • Official
FDA Structured Product Label from the electronic animal drug product listing directory.
-
Calmatrol SPL
• Structured Product Label • Official
FDA Structured Product Label from the electronic animal drug product listing directory.
-
Diphenhydramine HCL SPL
• Structured Product Label • Official
FDA Structured Product Label from the electronic animal drug product listing directory.
Data Sources & Change Log
Every non-trivial field is expected to include provenance and update timestamps.
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-05-05)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-05-03)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-04-30)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-04-29)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-04-28)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-04-27)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-04-26)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-04-25)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-04-17)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-04-15)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-04-15)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-04-11)
- contraindications: Use caution with glaucoma, urinary retention, or certain cardiac conditions. (Clinical, 2026-02-12)
- monitoring: Monitor blood glucose and ketones, hydration status, appetite, and clinical response at regular intervals. (Clinical, 2026-04-21)
- monitoring: Monitor blood glucose and ketones, hydration status, appetite, and clinical response at regular intervals. (Clinical, 2026-04-20)
- monitoring: Monitor blood glucose and ketones, hydration status, appetite, and clinical response at regular intervals. (Clinical, 2026-04-19)
- monitoring: Monitor blood glucose and ketones, hydration status, appetite, and clinical response at regular intervals. (Clinical, 2026-04-17)
- monitoring: Monitor blood glucose and ketones, hydration status, appetite, and clinical response at regular intervals. (Clinical, 2026-04-16)
- monitoring: Monitor blood glucose and ketones, hydration status, appetite, and clinical response at regular intervals. (Clinical, 2026-04-16)
- monitoring: Monitor blood glucose and ketones, hydration status, appetite, and clinical response at regular intervals. (Clinical, 2026-04-15)
- side_effects updated 2026-05-05 10:05 by etl_backfill • Backfilled from existing medication fields
- contraindications updated 2026-05-05 10:05 by etl_backfill • Backfilled from existing medication fields
- usage updated 2026-05-05 10:05 by etl_backfill • Backfilled from existing medication fields
- side_effects updated 2026-05-03 10:05 by etl_backfill • Backfilled from existing medication fields
- contraindications updated 2026-05-03 10:05 by etl_backfill • Backfilled from existing medication fields
- usage updated 2026-05-03 10:05 by etl_backfill • Backfilled from existing medication fields
- side_effects updated 2026-04-30 10:09 by etl_backfill • Backfilled from existing medication fields
- contraindications updated 2026-04-30 10:09 by etl_backfill • Backfilled from existing medication fields
- usage updated 2026-04-30 10:09 by etl_backfill • Backfilled from existing medication fields
- side_effects updated 2026-04-29 10:05 by etl_backfill • Backfilled from existing medication fields
- contraindications updated 2026-04-29 10:05 by etl_backfill • Backfilled from existing medication fields
- usage updated 2026-04-29 10:05 by etl_backfill • Backfilled from existing medication fields
- side_effects updated 2026-04-28 10:05 by etl_backfill • Backfilled from existing medication fields
- contraindications updated 2026-04-28 10:05 by etl_backfill • Backfilled from existing medication fields
- usage updated 2026-04-28 10:05 by etl_backfill • Backfilled from existing medication fields
- side_effects updated 2026-04-27 10:05 by etl_backfill • Backfilled from existing medication fields
- contraindications updated 2026-04-27 10:05 by etl_backfill • Backfilled from existing medication fields
- usage updated 2026-04-27 10:05 by etl_backfill • Backfilled from existing medication fields
- side_effects updated 2026-04-26 10:06 by etl_backfill • Backfilled from existing medication fields
- contraindications updated 2026-04-26 10:06 by etl_backfill • Backfilled from existing medication fields
Usage
Antihistamine sometimes used for allergies/itching and mild allergic reactions; may cause mild sedation.
Contraindications
Use caution with glaucoma, urinary retention, or certain cardiac conditions.
Side Effects
Sedation, dry mouth, GI upset; occasional paradoxical excitement.
Source: FDA openFDA • Reference
Top Reported Reactions (openFDA)
De-duplicated reaction terms grouped by body system from FDA openFDA reports (not verified; does not prove causation).
Showing top 5 for Digestive.
Showing top 5 for Skin & allergy.
Showing top 5 for Neurologic.
Showing top 5 for Behavior.
Show more (18)
Showing top 5 for Other.
Data source: FDA openFDA Animal & Veterinary adverse event reports.
Adverse Event Case Summaries (openFDA)
These are individual FDA adverse event reports. They are unverified and do not prove the medication caused the reaction.
Cat, Domestic Shorthair, Male, 7 year, 8.618 kilogram • Drug: MSK, Unassigned, Oral, Frequency: 12 per hour • Reactions: Injection site hair loss, Reddening of the skin, Weight loss, Skin lesion NOS, Wound… • Outcome: Ongoing
- Report ID: USA-USFDACVM-2025-US-075379
- Serious AE: Yes
- Treated For AE: Yes
- Sex: Male
- Age: 7.00 Year
- Weight: 8.618 Kilogram
- Case-reported brand: MSK
- Case-reported manufacturer: MSK
- Route: Oral
- Form: Unassigned
- Frequency: 12 per hour
Dog, ['Great Pyrenees', 'Retriever - Labrador'], Female, 31.661 kilogram • Drug: MSK, Unassigned, Unknown • Reactions: Vomiting • Outcome: Ongoing
- Report ID: USA-USFDACVM-2025-US-075148
- Serious AE: Yes
- Treated For AE: Yes
- Sex: Female
- Weight: 31.661 Kilogram
- Case-reported brand: MSK
- Case-reported manufacturer: MSK
- Route: Unknown
- Form: Unassigned
Dog, ['Terrier - Jack Russell', 'Terrier - Bull - American Pit'], Female, 1 year, 17.236 kilogram • Drug: MSK, Unassigned, Unknown • Reactions: Vomiting, Hives, Reddening of the skin, Skin irritation, Urine leakage… • Outcome: Ongoing
- Report ID: USA-USFDACVM-2025-US-074361
- Serious AE: Yes
- Treated For AE: Yes
- Sex: Female
- Age: 1.00 Year
- Weight: 17.236 Kilogram
- Case-reported brand: MSK
- Case-reported manufacturer: MSK
- Route: Unknown
- Form: Unassigned
Dog, ['Retriever - Golden', 'Poodle - Standard'], Male, 7 year, 43.273 kilogram • Drug: MSK, Unassigned, Unknown • Reactions: Thrombocytopenia, Blood loss NOS, Skin petechiae, Death • Outcome: Died
- Report ID: USA-USFDACVM-2025-US-074431
- Serious AE: Yes
- Treated For AE: Yes
- Sex: Male
- Age: 7.00 Year
- Weight: 43.273 Kilogram
- Case-reported brand: MSK
- Case-reported manufacturer: MSK
- Route: Unknown
- Form: Unassigned
Dog, Terrier - Bull - American Pit, Male, 1 year, 33.339 kilogram • Drug: MSK, Tablet, Oral, Dose: 75 Milligram per animal • Reactions: Aggression • Outcome: Recovered/Normal
- Report ID: USA-USFDACVM-2025-US-074416
- Serious AE: No
- Treated For AE: No
- Sex: Male
- Age: 1.00 Year
- Weight: 33.339 Kilogram
- Case-reported brand: MSK
- Case-reported manufacturer: MSK
- Route: Oral
- Form: Tablet
- Dose: 75 Milligram per animal
Dog, Terrier - Boston, Male, 9.75 year, 17.83 kilogram • Drug: MSK, Unassigned, Oral • Reactions: Proteinuria, Hypoalbuminaemia • Outcome: Ongoing
- Report ID: USA-USFDACVM-2025-US-074249
- Serious AE: No
- Treated For AE: No
- Sex: Male
- Age: 9.75 Year
- Weight: 17.830 Kilogram
- Case-reported brand: MSK
- Case-reported manufacturer: MSK
- Route: Oral
- Form: Unassigned
Dog, ['Bichon Frise', 'Chihuahua'], Female, 15 year, 3.493 kilogram • Drug: MSK, Unassigned, Unknown, Frequency: 12 per hour • Reactions: Seizure NOS, Unsteady walking (ataxia), Urinary incontinence • Outcome: Ongoing
- Report ID: USA-USFDACVM-2025-US-074064
- Serious AE: Yes
- Treated For AE: Yes
- Sex: Female
- Age: 15.00 Year
- Weight: 3.493 Kilogram
- Case-reported brand: MSK
- Case-reported manufacturer: MSK
- Route: Unknown
- Form: Unassigned
- Frequency: 12 per hour
Dog, Shih Tzu, Female, 11.68 year, 6.53 kilogram • Drug: MSK, Parenteral • Reactions: Not eating, Periorbital oedema, Fever, Local swelling, Nasal discharge… • Outcome: Ongoing
- Report ID: USA-USFDACVM-2025-US-074693
- Serious AE: Yes
- Treated For AE: Yes
- Sex: Female
- Age: 11.68 Year
- Weight: 6.530 Kilogram
- Case-reported brand: MSK
- Case-reported manufacturer: MSK
- Route: Parenteral
Data source: FDA openFDA Animal & Veterinary adverse event reports.
Overdose Information
Overdose causes extreme drowsiness, tremors, seizures, or hyperexcitability. In severe cases, respiratory failure is possible. Treat with IV fluids, seizure control.
Storage & Handling
Store at room temperature.
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