Should I worry about my dog's Nexgard side effects: hair loss, lethargy, no appetite?

Question

My dog has Demodex mites along with ringworm. She was given nexgard for the Demodex and i am noticing hair loss, sporadic lethargy and loss of appetite. Should I be concerned? Pet's info: Dog | Yorkshire Terrier | Female | unspayed | 6 months and 20 days old | 3 lbs

Rebecca, DVM · Accepted Answer

Hi, thank you for using Petco Pet Education Center, formerly Petcoach. Poor Myla, it sounds like she is having a bad time. The hairloss can occur from both ringworm and Demodex. Lethargy and loss of appetite could be a possible side effect of nexgard or can also be side effects of any antibiotic and antifungal medications she may be on. As long as she is relatively alert and active, then I would contact her regular vet in the morning to discuss your concerns. If she is severely lethargic, hasn't eaten at all in more than 12 hours or showing other signs of illness then I recommend taking her to an emergency vet tonight to have her checked out. I hope she's feeling better soon.

Should I worry about my dog's Nexgard side effects: hair loss, lethargy, no appetite?

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