1 / 7VECTRA 3D Flea and Tick Drops for Dogs 11–20 lb, 3-Month Supply
Supply: VECTRA 3D flea and tick drops for dogs are a three-dose topical treatment listed for dogs weighing 11–20 lb. The listing claims monthly flea and tick prevention plus mosquito repellency, with a single-dose applicator and protection stated to become waterproof after 24 hours.
At a glance
- Topical monthly application is described as a single dose applied directly to the skin.
- The listing claims flea feeding reduction can begin in as little as 5 minutes, with fleas killed within 4 hours.
- The product is claimed to repel mosquitoes as well as provide flea and tick prevention.
- The listing says the formula becomes waterproof after 24 hours.
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 Medium Dogs 21-55 lbs, 3‑Month | Topical Flea Drops | Kills and Repels Fleas, Ticks & Mosquitoes | Fast‑Acting, Waterproof, No Prescription Needed
$42.39
Pros and cons
Pros
- Three tubes support a monthly routine across the listed three-month pack period.
- The listing describes quick-drying, non-greasy application and mosquito repellency in addition to flea and tick prevention.
- No prescription is required, according to the listing.
Technical specifications
13 specifications| Brand | VECTRA 3D |
|---|---|
| Model | D73814B |
| Target dog size | Small |
| Listed age range | 8 Weeks or Older |
| Form | Drops |
|---|---|
| Active ingredients | Dinotefuran, Permethrin, Pyriproxyfen |
| Scent | Unscented |
| Volume | 0.16 fluid ounces |
| Weight listed | 0.86 g |
| Allergen information | Abalone Free |
| Dimensions listed | 5.25 x 1 x 5.25 inches; 0.03 ounces |
|---|
| Included components | 3 tubes |
|---|---|
| Protection interval per application | Each topical application delivers up to one month of protection. |
What to know before buying
- The listing targets dogs weighing 11–20 lb and gives an age range of 8 weeks or older. Confirm the correct weight range and suitability with a veterinarian before applying, especially if the dog has a history of skin reactions. The claimed waterproof interval is 24 hours after application.
What’s in the box
Included- 3 tubes
Who is it for?
A good fit for
- Owners seeking a topical monthly flea and tick treatment for dogs weighing 11–20 lb.
- Buyers who also want mosquito repellency and prefer a three-dose pack.
Less suited to
- Dogs outside the listed 11–20 lb weight range.
- Owners seeking a treatment with consistently positive reported effectiveness or side-effect experiences, as customer feedback is mixed.

Customer reviews on Amazon
- 5 stars
71% 71% - 4 stars
11% 11% - 3 stars
8% 8% - 2 stars
3% 3% - 1 star
7% 7%
Customer feedback is mixed on effectiveness, value, side effects, and duration. Some customers report that it works and lasts as expected, while others say it does not work for their dogs or report irritation. These varied experiences matter for a monthly topical treatment, so weigh the possibility of inconsistent results and skin reactions against the listing's claimed dosing interval. Overall ratings lean positive, but they do not resolve those specific concerns.
Mixed feedback
- Customers report mixed effectiveness, with some saying it works well and others saying it does not work for their dogs.
- Opinions on value and duration vary.
- Feedback on side effects ranges from no reported issues to significant irritation.
Frequently asked questions
How many applications are included?
The listing specifies three tubes and describes each topical application as providing up to one month of protection.
What weight range is this product listed for?
The product title specifies dogs weighing 11–20 lb. Use the weight range on the selected package and consult a veterinarian if unsure.
How soon is it claimed to work against fleas?
The listing says flea feeding may be reduced in as little as 5 minutes and fleas are killed within 4 hours. These are manufacturer claims, not independently verified results.
When does the listing say it is waterproof?
It claims the treatment is waterproof after 24 hours. Follow the package directions for application and water exposure.

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