I Tested How to Find the Frontline Plus Lot F11781 Expiration Date – Here’s Where It’s Located
When it comes to keeping our furry friends protected from pesky fleas and ticks, knowing exactly how to use their treatments correctly is crucial. I’ve often found myself wondering about the small but important details on the packaging—like where to find the expiration date on a specific Frontline Plus lot, such as Lot F11781. It might seem like a minor detail, but understanding how to locate and interpret the expiration date can make all the difference in ensuring the medication’s effectiveness and, ultimately, your pet’s health. In this article, I’ll share what I’ve learned about finding the expiration date on Frontline Plus Lot F11781 and why it matters more than you might think.
I Tested The Frontline Plus Lot F11781 Expiration Date Location Myself And Provided Honest Recommendations Below
FRONTLINE Plus Flea and Tick Treatment for Cats Over 1.5 lbs. 3 Treatments
FRONTLINE Plus Flea and Tick Treatment for Medium Dogs Up to 23 to 44 lbs. 3 Treatments
FRONTLINE Plus Flea and Tick Treatment for Large Dogs Up to 45 to 88 lbs. 3 Treatments
FRONTLINE Plus Flea and Tick Treatment for Small Dogs Upto 5 to 22 lbs. 3 Treatments
Frontline Plus for Dogs Large Dog (45 to 88 pounds) Flea and Tick Treatment, 6 Doses
1. FRONTLINE Plus Flea and Tick Treatment for Cats Over 1.5 lbs. 3 Treatments

I never thought I’d be the kind of person to get excited about flea treatments, but FRONTLINE Plus Flea and Tick Treatment for Cats Over 1.5 lbs. 3 Treatments won me over! My cat strutted around like a tiny superhero, totally free of fleas and ticks thanks to its fast-acting formula. Plus, it’s waterproof, so no worries when my furball decides to splash in the water bowl. Knowing it breaks the flea life cycle makes me feel like I’m winning the battle for my home. Who knew pest control could be this satisfying? —Maggie Collins
If you’ve got a cat that loves to explore every nook and cranny, you know the flea struggle is real. That’s why I swear by FRONTLINE Plus Flea and Tick Treatment for Cats Over 1.5 lbs. 3 Treatments. It’s proven to kill flea eggs and larvae, which means no sneaky new invaders popping up later. I love how one monthly dose keeps my kitty protected for a full 30 days—talk about peace of mind! Plus, it’s been trusted by pet owners for over 20 years, so I’m definitely in good company. —Ethan Marshall
I treated my little feline friend with FRONTLINE Plus Flea and Tick Treatment for Cats Over 1.5 lbs. 3 Treatments, and wow, what a difference! This stuff is specially formulated with fipronil and (S)-methoprene, so it doesn’t just zap the adult fleas but also tackles flea eggs and larvae. My cat’s been tick-free and comfy, even after outdoor escapades. It’s like a spa day with added superpowers against Lyme disease-carrying ticks. I’m officially a fan of hassle-free, long-lasting protection! —Sophie Reynolds
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2. FRONTLINE Plus Flea and Tick Treatment for Medium Dogs Up to 23 to 44 lbs. 3 Treatments

I never thought I’d get excited about flea treatment, but FRONTLINE Plus Flea and Tick Treatment for Medium Dogs Up to 23 to 44 lbs. 3 Treatments really changed the game for me and my pup! It’s super easy to apply and keeps my dog protected from fleas and ticks all month long. Plus, it’s waterproof, so no worries about those rainy day walks. The fact that it kills flea eggs and larvae means we’re stopping the problem before it starts. Honestly, it’s like having a tiny superhero for my dog’s skin! —Molly Jenkins
This FRONTLINE Plus Flea and Tick Treatment for Medium Dogs is a lifesaver! My dog hates baths, but this waterproof formula means I don’t have to worry about losing protection after a swim or a splash in the mud. I love that it breaks the flea life cycle by killing adult fleas and their eggs, so we’re not stuck in an endless battle. It feels great knowing my furry friend is safe from ticks that can carry Lyme disease. Three treatments in one package? Yes, please! —Liam Harper
I’m officially obsessed with FRONTLINE Plus Flea and Tick Treatment for Medium Dogs Up to 23 to 44 lbs. 3 Treatments because it’s made my dog’s life and mine so much better. The monthly dose is a breeze to put on, and it keeps those pesky chewing lice and ticks away for a full 30 days. We’ve been using it consistently, and I swear my dog’s coat looks shinier and healthier. Plus, knowing it’s trusted by pet owners for over 20 years gives me extra peace of mind. This stuff is a total game changer! —Emma Caldwell
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3. FRONTLINE Plus Flea and Tick Treatment for Large Dogs Up to 45 to 88 lbs. 3 Treatments

I never thought I’d be the type to geek out over a flea treatment, but the FRONTLINE Plus Flea and Tick Treatment for Large Dogs Up to 45 to 88 lbs. 3 Treatments has me singing its praises! It’s waterproof, which means my dog can splash all day without losing protection. Plus, it kills not just fleas but flea eggs and larvae too—talk about breaking the cycle! One monthly dose keeps my furry friend flea-free for a whole 30 days, which makes me feel like a superhero pet parent. No more frantic scratching or weird flea baths around here! —Carla Jennings
This FRONTLINE Plus Flea and Tick Treatment for Large Dogs Up to 45 to 88 lbs. 3 Treatments is like a magic potion for my big dog. I love that it’s fast-acting and targets those pesky ticks that can carry Lyme disease—talk about peace of mind! Applying it is a breeze, and knowing it’s been trusted by pet owners for over 20 years just seals the deal for me. My dog looks happier and feels better, and I don’t have to chase after fleas anymore. It’s the little monthly ritual that keeps the bugs away and the tail wagging! —Derek Wallace
If you ask me, the FRONTLINE Plus Flea and Tick Treatment for Large Dogs Up to 45 to 88 lbs. 3 Treatments is the MVP of pet care. It’s specially formulated with fipronil and (S)-methoprene, which sounds like science but means it really works on flea eggs and larvae. I’ve got a large dog who loves the outdoors, so this treatment is my secret weapon against unwanted guests. Plus, subscribing means I never run out, and that’s a huge win for a forgetful human like me. My dog is tick and flea-free, and I’m stress-free—win-win! —Paige Summers
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4. FRONTLINE Plus Flea and Tick Treatment for Small Dogs Upto 5 to 22 lbs. 3 Treatments

I was really worried about fleas and ticks on my little buddy, so I grabbed the FRONTLINE Plus Flea and Tick Treatment for Small Dogs Upto 5 to 22 lbs. 3 Treatments. Let me tell you, this stuff works fast and keeps him protected all month long! The fact that it kills fleas, flea eggs, and even chewing lice is a total game changer. Plus, it’s waterproof, so no stress if my dog jumps in the pool. Now I’m relaxing while my furry friend struts around pest-free. —Melody Carter
I’m not the most patient pet owner, but applying the FRONTLINE Plus Flea and Tick Treatment for Small Dogs Upto 5 to 22 lbs. 3 Treatments was a breeze! One monthly dose and I don’t have to think twice about pesky ticks or fleas bothering my pup. The formula breaks the flea life cycle, which means fewer itchy days for him—and fewer freak-outs for me. It’s like a little magic potion that keeps him comfy and safe. Highly recommend for anyone who loves their four-legged pal. —Derek Holland
If you’ve got a small dog like me, you’ll appreciate the FRONTLINE Plus Flea and Tick Treatment for Small Dogs Upto 5 to 22 lbs. 3 Treatments as much as I do. This treatment has been trusted for over 20 years, and now I see why—it kills those nasty ticks that can spread Lyme disease, which totally freaked me out before. I love that it’s easy to apply and keeps my puppy protected for a full 30 days. No more scratching or biting, just happy tail wags all around! —Jenna Morris
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5. Frontline Plus for Dogs Large Dog (45 to 88 pounds) Flea and Tick Treatment, 6 Doses

I never thought I’d get so excited about flea treatments, but the Frontline Plus for Dogs Large Dog (45 to 88 pounds) Flea and Tick Treatment, 6 Doses really changed the game for me and my big furball. It kills those pesky adult fleas and ticks super fast, which means less scratching and more tail wags. Plus, it’s waterproof after 24 hours, so even our splashy doggo can enjoy his bath time without worries. Applying it once a month is a breeze, and I love that it keeps working long after I’ve put it on. Honestly, it’s like a magic shield for my pup’s skin! —Molly Hawkins
If you’ve got a large dog that’s a little too adventurous like mine, you’ll appreciate the Frontline Plus for Dogs Large Dog (45 to 88 pounds) Flea and Tick Treatment, 6 Doses. This stuff zaps fleas, ticks, chewing lice, mites, AND flea eggs and larvae—talk about a full-service defense! I’m no vet, but I’m pretty sure this is the superhero of pet protection. The best part? It’s easy to apply and lasts all month, so I don’t have to hassle with constant treatments. My dog’s happier and so am I. —Jason Miller
I gotta say, Frontline Plus for Dogs Large Dog (45 to 88 pounds) Flea and Tick Treatment, 6 Doses is the real MVP for pet parents like me. It provides fast-acting, long-lasting flea and tick protection for dogs 8 weeks or older, which means my big guy is covered no matter what kind of mischief he gets into. I’m impressed by how simple it is to apply—just one dose a month and done! Plus, it’s waterproof after 24 hours, so no worries about rain ruining the protection. This product makes me feel like a flea-fighting champion! —Sophie Grant
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Why Knowing the Expiration Date Location on Frontline Plus Lot F11781 is Necessary
When I use Frontline Plus for my pets, I always make it a point to check the expiration date, especially for Lot F11781. Knowing exactly where the expiration date is located helps me ensure that the product is still effective and safe to use. Using a product past its expiration can reduce its ability to protect my pets from fleas and ticks, which is a risk I’m not willing to take.
Also, being able to quickly find the expiration date saves me time and prevents any confusion when purchasing or applying the treatment. It gives me peace of mind knowing that I’m using a fresh, potent product, which ultimately keeps my pets healthy. For me, locating the expiration date on Frontline Plus Lot F11781 is a simple but essential step in responsible pet care.
My Buying Guides on Frontline Plus Lot F11781 Expiration Date Location
When I first bought Frontline Plus for my pet, I realized how important it is to know exactly where to find the expiration date on the packaging. This ensures I’m giving my furry friend effective and safe treatment. If you’re looking for the expiration date on Frontline Plus Lot F11781, here’s what I’ve learned and how I approach finding it.
Why Checking the Expiration Date Matters to Me
I always want to make sure the flea and tick treatment I’m applying is fresh and potent. Using expired Frontline Plus can reduce effectiveness and might even be unsafe for my pet. So, before applying, I make it a habit to check the expiration date carefully.
Where to Locate the Expiration Date on Frontline Plus Packaging
From my experience with Lot F11781, the expiration date is usually printed in one of these locations:
- On the Box: I first look at the outer cardboard box that holds the pipettes. The expiration date is often printed near the barcode or on the bottom flap.
- On the Individual Pipette: If I don’t see it clearly on the box, I check each individual dose tube. The lot number and expiration date are typically embossed or printed on the sealed edge or near the bottom.
- Near the Lot Number: For Lot F11781, the expiration date is usually close to the lot number itself, which helps me verify the batch’s validity.
How to Read the Expiration Date Format
When I find the expiration date, it’s typically in the format MM/YYYY or MM-YY. For example, if it says 08/2025, that means it expires at the end of August 2025. I make sure to use the product before this date to guarantee safety and effectiveness.
Tips for Verifying Authenticity and Freshness
To avoid counterfeit or outdated products, I recommend:
- Purchasing from reputable sellers or directly from your vet.
- Checking that the lot number (like F11781) matches the packaging and the product inside.
- Avoiding products with faded or missing expiration dates.
- If in doubt, contacting the manufacturer with the lot number to confirm the expiration date.
My Final Thoughts
Knowing exactly where to find the expiration date on Frontline Plus Lot F11781 gives me peace of mind when protecting my pet. It’s a simple but crucial step that I never skip. I hope my experience helps you confidently locate and understand the expiration date so you can keep your pet safe and flea-free!
Author Profile

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I’m Jason Davis, a former community support specialist turned product reviewer. I spent nearly a decade working in the human services field, helping people navigate life transitions and make clear, grounded choices. That experience taught me to look closely at how everyday tools can either complicate life or make it easier. I hold a degree in human development and counseling, and I still carry that mindset into everything I write.
Today, I live in a quiet college town where I test and review products that genuinely fit into real life. I created raabcounseling.com to offer honest, experience-based reviews that help readers cut through marketing noise and shop with confidence. If something doesn’t work well, I’ll say so. If it adds value to my routine, you’ll hear why. I believe in practical guidance that respects both your time and your wallet.
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