A pet’s immune system has a significant influence on their overall health. A strong immune system can help fight off certain illnesses and can contribute positively to your pet’s well-being. However, a weak immune system can make your pet susceptible to some illnesses and diseases. You can check on the health of your pet’s immune system by taking your pet in for a visit to the veterinarian. Your veterinarian will diagnose any health issues your pet might be experiencing, and if needed, will prescribe your sick dog or sick cat with prescription immune support pet medications. If your veterinarian diagnoses autoimmune disease in dogs or autoimmune disease in cats, then she might prescribe one of the immune system support vet medications we offer. Some of these act as anti-inflammatories to help with conditions such as arthritis, while others suppress the immune system to help with leukemia and other cancers. With Chewy's Pharmacy, you can be sure your pet is receiving trusted pet medications that are of the highest quality. When you order your pet medications online from Chewy’s pet pharmacy, you can expect fast shipping, so you can get your pet started on his treatment as soon as possible to get him back to good health. All you have to do is find the medication in our pet pharmacy, add it to your cart, and enter your vet’s info at checkout. Our pet Rx team will then contact your veterinarian for approval. Besides immune support, the Chewy pet pharmacy offers prescription pet prescription allergy relief & treatment as well as prescription dewormers & parasite treatments. Our vast options of online pet meds will make Chewy pet pharmacy your one-stop shop for all of your pet’s prescriptions. Just don’t forget a bag or two of dog treats or cat treats to help make medication time easier for everyone.