Diphenhydramine HCI Capsules (Manufacturer may vary - US 7286
Diphenhydramine HCI Capsules (Manufacturer may vary - US 7286
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Diphenhydramine HCl Capsules for Allergies and Anxiety in Pets
Product Description
Diphenhydramine HCl 25 mg Capsules are a prescription-dispensed, first-generation antihistamine for dogs and cats used to ease allergy symptoms, insect bite reactions, motion sickness, and travel anxiety. It works by blocking H1 histamine receptors to bring down itching, swelling, and sneezing in affected pets. The 25 mg strength is a lighter option well suited to smaller animals or those starting on a lower dose under veterinary care.
Benefits
- Relieves Allergy Symptoms: Blocks H1 histamine receptors to ease itching, sneezing, watery eyes, and hives triggered by seasonal or environmental allergens in pets.
- Insect Bite Relief: Brings down swelling, itching, and soreness caused by insect bites and stings in dogs and cats under veterinary guidance.
- Motion Sickness Control: The antiemetic and calming properties of this medication help reduce nausea and vomiting linked to motion sickness in treated pets.
- Mild Anxiety Support: Offers a mild settling effect during unsettling events such as vet visits or car travel when recommended and prescribed by a veterinarian.
- Lower Strength Option: The 25 mg capsule is the right fit for small dogs, cats, or pets where a lighter prescribed dose has been recommended by a vet.
Ingredients
Active Ingredient
| Ingredient | Strength per Capsule |
| Diphenhydramine Hydrochloride (Active) | 25 mg |
How to Use
Directions for Use
Diphenhydramine HCl 25 mg Capsules are dispensed as a prescription medication at HardyPaw. A valid veterinarian prescription is required to purchase this product. Please follow your veterinarian's instructions carefully for the dosage and administration of this medication.
Disclaimer: Dosage and administration of this medication must be determined by a licensed veterinarian. Your veterinarian should be contacted before starting or modifying any medication for your pet.
Tucking a capsule inside a soft Pill Pocket or wrapping it in a small piece of your pet's favourite treat is a simple and stress-free way to make sure each dose goes down without a struggle. Shop Pill Pockets for Dogs | Shop Pill Pockets for Cats
Additional Information
Precautions
- Glaucoma Caution: Do not use in pets with glaucoma, as the anticholinergic effects of this medication may push intraocular pressure to a harmful level.
- Urinary Obstruction Risk: Pets with prostatic hypertrophy or bladder neck obstruction should not receive this product, as urinary retention is a recognised anticholinergic effect.
- Respiratory Disease: Take extra care in pets with breathing difficulties, as this medication may thicken secretions and make existing respiratory problems noticeably worse.
- Pregnancy and Lactation: Keep away from pregnant or nursing animals, as antihistamines can interfere with fetal development and find their way into nursing milk.
- Allergy Skin Testing: Stop giving this product at least two weeks ahead of any planned intradermal allergy testing, as it can throw off accurate test outcomes.
- Working Animal Caution: Use carefully in service, police, or working animals, since the sedation this product causes can get in the way of their duties and performance.
- Drug Interactions: Extra care is needed when combining with CNS depressants, barbiturates, tricyclic antidepressants, epinephrine, or heparin in any treated pet.
- Severe Allergic Reactions: This product is not the right response to serious anaphylaxis involving breathing trouble, facial swelling, or collapse; these need emergency veterinary care immediately.
- Human Combination Products: Human diphenhydramine formulations that contain decongestants or pain relievers must never be given to pets as those additives are toxic.
- Prescription Required: This product is dispensed as a prescription medication at HardyPaw; a valid veterinarian prescription must be in place before purchase.
Possible Side Effects
- Drowsiness and Sedation: The most frequently noted reaction; sedation tends to be strongest with the opening dose and generally softens with continued treatment over time.
- Dry Mouth: Reduced saliva output is a known anticholinergic effect of this product, and heavier-than-normal drooling has been noted particularly in cats.
- Urinary Retention: Some pets, especially those with existing urinary or prostate issues, may find passing urine more difficult while on this medication.
- Vomiting and Diarrhea: Occasional stomach upset including loose stools and vomiting has been reported in a number of pets taking this medication.
- Paradoxical Excitement: Rather than settling down, some cats become unusually active or restless; keeping them in a calm, confined space until this passes is advisable.
- Overdose Signs: Seizures, extreme drowsiness, coma, or slowed breathing may point to an overdose; get emergency veterinary help without any delay.
Storage Information
- Room Temperature Storage: Temperatures between 59°F and 86°F in a dry, low-light area of the home are what this product needs to stay in good condition.
- Avoid Bathroom Storage: The humidity and temperature shifts in bathrooms can wear down capsule quality over time; a cool, stable indoor spot works better.
- Keep Out of Reach: Store in a secure location well away from children and other household animals to remove any chance of accidental ingestion.
NOTE: For generic medications, the product image shown may not reflect the actual item received. Generic medications can vary in size, color, and shape between orders depending on the manufacturer. Additionally, your medication may arrive packaged in a HardyPaw Pharmacy vial.
Shipping & Return
We offer ground, express, and priority delivery; see our shipping policy for details.
For return instructions or product concerns, please refer to our detailed refund policy.
Prescription items are NON-RETURNABLE and NON-REFUNDABLE.
Frequently Asked Questions
Q1: What is Diphenhydramine HCl 25 mg used for in dogs and cats?
Ans: This antihistamine is used off-label in dogs and cats to ease allergy symptoms, insect bite reactions, and motion sickness. It blocks H1 histamine receptors to reduce itching, swelling, and sneezing. The 25 mg capsule suits smaller pets or those starting on a lower prescribed dose.
Q2: Why is Diphenhydramine dispensed as a prescription at HardyPaw?
Ans: HardyPaw is an NABP-authenticated Rx pharmacy where diphenhydramine is dispensed under veterinary prescription to keep its use safe and appropriate for every pet. A valid prescription confirms the right product and strength have been selected to match your pet's specific health needs.
Q3: What is the difference between the 25 mg and 50 mg Diphenhydramine capsules?
Ans: Both hold the same active ingredient and work through the same mechanism. The 25 mg capsule is the lighter option, suited to smaller dogs, cats, and pets needing tighter dose control for allergy management. Your veterinarian will confirm the correct strength for your pet.
Q4: Is Diphenhydramine 25 mg safe for cats as well as dogs?
Ans: Yes, it is used in both species under veterinary guidance. Cats may occasionally respond with unusual excitement rather than sedation. Liquid versions can be tricky to give cats due to taste. Always follow your vet's instructions on strength and how often to give it.
Q5: What should I do if my pet shows signs of a Diphenhydramine overdose?
Ans: Extreme drowsiness, seizures, coma, or slowed breathing may all point to an overdose situation. If any of these warning signs show up, get your pet to a vet or emergency animal facility as fast as possible. Quick action is essential, as an overdose of this product can become life-threatening without prompt veterinary care.
Clinical Research:
This Shipping Policy explains how orders are processed, shipped, tracked, and delivered.
1. Shipping Origin and Fulfillment
Orders are dispatched from our U.S.-based fulfillment center. We deliver to eligible addresses within the United States and to eligible international destinations shown at checkout.
If a destination, shipping service, or product is not eligible for delivery, checkout will not offer that shipping option.
2. Order Processing Time
Orders are generally processed within 1–5 business days before shipment. Processing time is separate from carrier transit time.
Our order cut-off time is 6:00 PM Pacific Time (PT). Orders placed after the cut-off time, on weekends, or on applicable holidays begin processing on the next business day.
Processing may include order verification and preparation for shipment.
3. U.S. Shipping Methods, Costs, and Transit Times
For eligible U.S. addresses, our current shipping options are:
- Priority Shipping: $5.99 — estimated carrier transit time of 1–2 business days after shipment.
- Standard Shipping: $2.99 — estimated carrier transit time of 3–6 business days after shipment.
- Free Shipping: $0 — estimated carrier transit time of 5–8 business days after shipment.
Total estimated delivery time includes both the 1–5 business day processing period and the applicable carrier transit time. The shipping service, cost, and delivery estimate available for your order are shown at checkout before payment.
4. International Shipping
We ship to eligible international destinations. Available international shipping services, shipping charges, and estimated delivery times vary by destination and are displayed at checkout.
For eligible international orders, applicable import duties and taxes are calculated and collected at checkout where required. When these charges apply, the order is shipped on a duties-and-taxes-paid basis so that the same import charges should not be collected again at delivery.
International delivery estimates may be affected by carrier operations, customs processing, local holidays, weather, or other events outside normal transit conditions.
5. Tracking
When tracking is available, you will receive shipment confirmation with tracking information after the order has shipped. Please allow up to 48 hours for tracking information to become active after the carrier receives the shipment.
6. Address Accuracy and Changes
Please review your shipping address carefully before submitting an order. If you notice an address error, contact us as soon as possible. We will try to help before shipment, but an address change cannot be guaranteed once fulfillment or carrier processing has begun.
Additional carrier or re-delivery charges resulting from an incorrect or incomplete address may be the customer's responsibility where permitted by law.
7. Delayed or Lost Shipments
If your shipment has not arrived within the estimated delivery timeframe, please contact us. We will review the tracking information, work with the carrier when necessary, and assist with an appropriate resolution based on the circumstances.
Delivery estimates are not guarantees and may be affected by carrier delays, weather, public holidays, customs processing, or other transportation disruptions.
8. Damaged, Defective, or Incorrect Deliveries
If an item arrives damaged, defective, or incorrect, contact us within 7 calendar days after confirmed delivery. Please include your order number and clear photos of the item, packaging, and shipping label when relevant.
Approved cases are handled under our Return & Refund Policy, including return-shipping assistance when the issue is our responsibility.
9. Policy Updates
We may update this Shipping Policy when our shipping services or operating requirements change. The current version will be posted on this page.
10. Contact Us
If you have questions about shipping or an order in transit, please use our Contact page or the current contact information displayed in the website footer.
This Return & Refund Policy explains when a return is eligible, how to send an item back, who pays return shipping, and how approved refunds are processed.
1. Return Window
You may request an eligible return within 30 days after confirmed delivery. Return requests submitted after the 30-day period are not accepted unless applicable law requires otherwise.
2. Return Eligibility
To qualify for a standard return, the item must generally be:
- Unused, unwashed, and in its original condition.
- Returned with the original packaging, tags, accessories, manuals, and other included components, when applicable.
- Not specifically identified as final sale or non-returnable before purchase.
Products that show use, alteration, avoidable damage, missing components, or other conditions outside the eligibility requirements may be ineligible for a refund.
3. Product-Specific Non-Returnable Items
Some products may be non-returnable for hygiene, safety, customization, final-sale, or other product-specific reasons. Any such restriction will be disclosed on the product page or before purchase when applicable.
4. No Direct Exchanges
We do not provide direct exchange service. If you want a different item, size, color, model, or version, return the eligible original item under this Policy and place a new order separately.
5. How to Start a Return
Returns are handled by mail. Before sending an item back, contact our customer support team through the Contact page or the current contact information displayed in the website footer. Please provide:
- Your order number.
- The item or items you want to return.
- The reason for the return.
Returns sent without required return authorization may be delayed or refused.
6. Prepaid Return Label and Return Shipping Cost
For eligible mail returns, a prepaid return label is included in the package.
For a standard return made for customer-choice reasons, the actual carrier postage charged for use of the prepaid return label will be deducted from the approved refund. We do not charge a separate restocking fee.
If the return is required because the item arrived damaged, defective, or incorrect and the claim is approved, we cover the return-label cost.
If you choose not to use the provided label when an alternative return method is authorized, use a trackable shipping service and keep your shipping receipt until the return is completed.
7. Original Shipping Charges
Original outbound shipping charges are non-refundable for standard customer-choice returns, except where required by law. If the return results from an approved damaged, defective, or incorrect item, applicable shipping charges will be handled as part of the resolution.
8. Refund Review and Processing
After the returned item is received, we inspect it and notify you whether the refund is approved.
If approved, the refund is issued to the original payment method. We generally process an approved refund within 1–3 business days. After the refund is issued, your bank or card provider may require an additional 5–10 business days to post the funds to your account.
9. Damaged, Defective, or Incorrect Items
If an item arrives damaged, defective, or incorrect, contact us within 7 calendar days after confirmed delivery. Include your order number and clear photos of the item, packaging, and shipping label when relevant.
After review, we will provide an appropriate resolution. When a return is required for an approved claim, we cover the return shipping cost.
10. Refused or Undeliverable Shipments
If a shipment is refused or returned because of incorrect or incomplete customer-provided shipping information, actual carrier return, re-delivery, or related shipping charges may be deducted from an otherwise eligible refund where permitted by law.
11. Policy Updates
We may update this Return & Refund Policy when our return procedures or legal requirements change. The current version will be posted on this page.
12. Contact Us
If you need help with a return or refund, please use our Contact page or the current contact information displayed in the website footer.
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