Online Pet Pharmacy in the US?

Can anyone recommend an online pet pharmacy in the US?  I'm comparing prices on 1-800 Pet meds as well as Drs Fosters & Smith.  My vet's office has a new system where they are partnered with another online pet pharmacy; but the prices are significantly more than in the office.  It does say on there than I can still use a pharmacy of my choosing; but for some reason I'm hesitant to start ordering their meds online.  Yet I'm also sick of running to the vet just to pick meds up.   

We have used Drs Foster & Smith with much success.  Their prices were significantly less on the flea meds we use for our kitties.

Does your vet offer a matching price guarantee on flea meds? Mine does, but I didn't know this until I was given the inside information. All I have to do is show the receptionist my catalog and I pay what's in the catalog. [emoji]9786[/emoji]️

I don't know if they price match.  I don't treat my girls for fleas since they are indoor only (although thats a tid bit I'll be sharing with my mother!!).  Noodles is on meds for CHF and Mooch is on Pred.  I already order her Denamarin from Chewy because it's usually around $25 there vs $40 in the vet's office!!

We use Roadrunner https://www.roadrunnerpharmacy.com/pet-lovers  for our compounded drugs for Callie.

What pet supply on line have u found most reasonable. Still Dr. Foster? Need effective flea med(topical) for 3 cats. Two are indoor/outdoor and brought

fleas into house. Will use capstar to kill, but want to wait til I can reduce cost(like Revolution, but very expensive. Thanks.

Since this was posted some time ago, are u still using Dr. Fosters? Looking for flea med. at reasonable price for 3 cats in Louisiana.  

Two indoor/outdoor cats have brought fleas inside. I used capstar to kill. Then topical. They are back after 3 months.

I did buy diatomaceous earth for house carpets and seems to have worked. I wish I could find a better price for revolution because

that has worked in past.

I purchase flea meds from 1800-pet meds. Haven't looked at Drs Foster/Smith for flea meds; however, I have purchased medications from them (at my vet's prompting.)

Thanks. Will try