I have never had any problems with doxycycline when doing a doxycycline order online, but I always consult with my vet or doctor first.
You will need to have a prescription from your doctor to buy Allopurinol tablets.
If you're experiencing fluid buildup due to liver disease, talk to your doctor about whether you should buy furesimide.
If you're allergic to sulfa, you can't take 12.5 mg furosemide. Watch out for that, fam.