Common Brand Names

There is no product available as a single ingredient for use with household pets.

Combined Ingredients

Uses Of (S)-methoprene

(S)-methoprene is used to control fleas in cats and dogs. However, it does not protect your pet by killing fleas but will disrupt its life cycle, preventing early stages from developing them into adults.

Pyriproxyfen does not use as a single-ingredient product, but it is combined with another ingredient to extend the efficiency of flea treatment.

Method Of Application

It is used as an external application. It comes in topical solutions when combined with another ingredient.

Dosage And Administration

Pyriproxyfen does not come in as a single-ingredient product.

Therefore, always refer to the information of the specific product and only use it as directed.

Possible Side Effects

Cats and dogs tolerate (S)-methoprene well. It has a high safety margin and low toxicity.

Signs Of Toxicity

Poisoning from (S)-methoprene is unlikely due to its high tolerance and low toxicity in dogs and cats. However, high doses of (S)-methoprene may cause reduced activity, diarrhea, failure to gain weight, loss of muscle control, and unusual breathing. In addition, dogs may undergo vomiting.

If you suspect your dog or cat has overdosed, please get in touch with your veterinarian immediately.


The information provided on this page is for normal reference only and is not intended to replace veterinary advice or packaging label. You should consult your vet first. Here may have included only some of the uses, side effects, brand names, or applications.

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