Product guide

VECTRA 3D D73825D Flea and Tick Drops for Medium Dogs, 21–55 lb, 3-Month

Drops: VECTRA 3D D73825D is a three-dose topical flea and tick treatment listing a weight range of 21–55 lb for medium dogs. The listing also claims mosquito repellency and up to one month of protection per application, with waterproofing after 24 hours.

At a glance

The listing describes a monthly topical treatment for fleas and ticks and says it also repels mosquitoes.
It claims flea feeding can be reduced in as little as 5 minutes and fleas killed within 4 hours.
The product is described as waterproof after 24 hours and as quick-drying and non-greasy.

Price

$42.39Save 20%

Reference price: ~~$52.99~~

Price checked: Nov 14, 2026

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Often bought together

Vectra 3D Flea and Tick Prevention for Large Dogs 56–95 lbs, 3‑Month | Topical Flea Drops | Kills and Repels Fleas, Ticks & Mosquitoes | Fast‑Acting, Waterproof, No Prescription Needed

$42.39

Vectra 3D Flea and Tick Prevention for Small Dogs 11-20 lbs, 3‑Month | Topical Flea Drops | Kills and Repels Fleas, Ticks & Mosquitoes | Fast‑Acting, Waterproof, No Prescription Needed

$39.99

Pros and cons

Pros

Three monthly doses provide a stated three-month supply when used on the listed monthly schedule.
The listing specifies a medium-dog weight range and gives the active ingredient percentages.
Customer feedback describes the application as easy, though reports about residue differ.

Cons

Topical application requires a recurring monthly routine rather than a longer interval between doses.

Technical specifications

12 specifications

Identity and fit
Brand	VECTRA 3D
Model	D73825D
Dog size	Medium
Weight range	21-55 lbs

Treatment details
Form	Drops
Active ingredients	Permethrin 36.08%, Dinotefuran 4.95%, Pyriproxifen 0.44%
Age range listed	All Life Stages
Scent	water
Allergen information	Abalone Free
Item type	Flea and Tick

Dimensions and weight
Dimensions listed	5.25 x 1 x 5.25 inches; 0.13 ounces
Weight listed	3.67 g

What to know before buying

The listing says the product is for dogs only and explicitly says not to use it on cats. Follow product directions and consult a veterinarian about suitability for an individual dog. Its claims about fast action, repelling pests and waterproofing are listing claims, not independently verified here.

What’s in the box

Included

3 monthly doses

Who is it for?

A good fit for

Owners seeking a topical monthly flea and tick treatment for a dog within the listed 21–55 lb range.
Buyers looking for a listing that also claims mosquito repellency and a waterproof-after-24-hours formula.

Less suited to

Cats, because the listing says not to use this product on cats.
Dogs outside the stated 21–55 lb range.

Customer reviews on Amazon

4.5 / 5 · 990 ratings

5 stars78%78%
4 stars12%12%
3 stars4%4%
2 stars1%1%
1 star5%5%

Customer feedback reports positive experiences with effectiveness and ease of application, including mentions of long-term use on beagles. Experiences with greasiness and value are mixed, with some reporting oily residue and some saying they would not buy it again. These perceptions matter for a leave-on monthly topical, but they do not establish how it will perform or feel on a particular dog.

Positive themes

Customers report that the treatment has worked well for their dogs.
Some customers describe application as easy.

Mixed feedback

Some customers say it is not greasy, while others report oily residue.
Customer views on value differ, including reports of satisfaction and unwillingness to repurchase.