I want to buy it but afraid of side effects,r there any?i live in greece&even pet docs do not know this product,is it safe? thank u

Hi, in my opinion this is the best one in the market that actually works with no side affects what so ever! Never the ones from the vets are terrible. We used this for 2 years in the summer time and this is our second year of not having to treat our cats..... Hope I've helped 

Do these work to both prevent and kill fleas?

No they only kill adult fleas, they don't prevent

Is it safe to give it to a cat in heat?

I'm afraid I'm unsure of that as I use them on my kitten who is just over 7 months old, so not a situation I have had to think about but I will check on the packet and see what it says and let you know, 👍

Johnsons Veterinary Products 4fleas Tablets For Cats And Kittens Pack

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5735 Ft

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Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🐾 Strike fast, stay flea-free—because your cat’s comfort can’t wait!

SAFE VERSATILE USE - Suitable for kittens 4+ weeks, pregnant and lactating cats, and compatible with other flea treatments.
RAPID FLEA ERADICATION - Experience near-total flea elimination within 24 hours—because your cat deserves fast relief.
VETERINARY GRADE FORMULA - Trusted nitenpyram active ingredient delivers a powerful, targeted strike against fleas with zero long-term residue.
MESS FREE ORAL ADMINISTRATION - No sticky residues or odors—just pop the tablet whole or mix it into food for hassle-free dosing.
INTEGRATED FLEA CONTROL STRATEGY - Works seamlessly alongside spot-ons, collars, and environmental sprays for comprehensive protection.

Johnsons 4Fleas Tablets deliver a rapid, veterinary-grade oral flea treatment using 11.4mg of nitenpyram per tablet. Designed for cats and kittens over 4 weeks and 1kg, it kills fleas within 15 minutes and achieves full eradication in 24 hours without leaving any residue. The easy-to-administer tablets can be given whole or mixed with food and are safe to use alongside other flea control products, making them an essential first strike in a comprehensive flea management plan.

Specifications

ASIN	B002IS58UO
Batteries Included	No
Batteries required	No
Best Sellers Rank	505 in Pet Supplies ( See Top 100 in Pet Supplies ) 2 in Cat Flea Pills
Colour	Clear
Customer Reviews	4.3 4.3 out of 5 stars (6,165)
Date First Available	23 July 2009
Item Weight	9 g
Item model number	1614D090
Number of Items	1
Pet Type	Dog
Product Dimensions	10 x 10 x 1 cm; 9 g
Quantity	1
Size	One Size
Specific Uses	Parasites

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