Where to Buy Rapamycin for Dogs — and How the Prescription Works

Rapamycin for dogs is a prescription medicine. You cannot legitimately buy it over the counter, and any site that sells it to you without a veterinarian involved is one to walk away from. This guide explains how a real prescription works, what the therapy should cost, and the questions to ask before you pay.

Can you buy rapamycin for dogs without a prescription?

No. Rapamycin (sirolimus) is a prescription-only medicine everywhere it is legally supplied. In dogs it is prescribed off-label — legal where a licensed veterinarian judges it appropriate for the individual animal. The prescription is not a formality: it is the safety check. A vet confirms your dog is a candidate, sets the dose from body weight, and plans the monitoring. A seller who skips that step is skipping the part that protects your dog.

How the prescription actually works

There are two legitimate routes:

1. Your own veterinarian prescribes it. If your vet is comfortable prescribing rapamycin, they write the script and a pharmacy dispenses it. Not every vet has prescribed it, and some are cautious — which is reasonable, because the companion-animal evidence is still developing.
2. A veterinarian-directed service reviews the case for you. This is what Rapavie does: a licensed veterinarian reviews your dog’s history, confirms the right strength, and the medicine is dispensed against that prescription — while you keep your own vet in the loop. If your dog is not a candidate, the order is declined and refunded.

Either way, a veterinarian stands between you and the medicine. That is the point.

What it should cost

Rapamycin for dogs typically runs in the region of €100–€130 a month depending on your dog’s size, because the dose is set by weight and larger dogs need a higher strength. Be wary of prices far below that with no vet review attached — the review is a real cost, and its absence is a red flag, not a bargain. Our full pricing page lists every strength for both one-off purchase and membership.

What a legitimate supplier looks like

• A veterinary review is required before anything ships — there is no "add to cart and check out" for the medicine alone.
• Dosing is set by your dog’s weight, not one-size-fits-all.
• The pharmacy and prescribing are transparent, and they are willing to share the dosing rationale with your own vet.
• They can say no. A supplier that will sell to any dog regardless of its health is not screening for the conditions — diabetes, active infection, significant liver disease, a planned surgery, pregnancy — that make rapamycin the wrong choice.

What the science is (and is not) saying

Rapamycin is the most studied longevity molecule in veterinary medicine. It extends healthy lifespan in laboratory mammals, and it is now the subject of the NIH-funded Dog Aging Project’s TRIAD trial in companion dogs. That trial has not reported its primary results, so the honest position is that rapamycin’s effect on how long dogs live is under investigation, not established. Buy it for what is known — a well-studied molecule, prescribed and monitored properly — not for a promise nobody can yet make.

For the research laid out study by study, with nothing to sell you, see the evidence library at Our Beloved Friends.

When you are ready, the dog therapy starts with a veterinary review — and if your dog is not a candidate, you pay nothing.