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Nexgard spectra provides protection from Ticks, Fleas, Heartworm, Roundworms, Hookworms and Whipworms

Yes, NexGard Spectra is effective against certain types of mites. It is commonly used to treat and control infestations caused by: Demodex mites (causing demodectic mange) Sarcoptes mites (causing sarcoptic mange or scabies) Ear mites (Otodectes cynotis)

There is Expiration date is provided in the product description so you can be aware of the Expiration date on hand.

It is recommended, especially as it covers very dangerous heartworm.