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 it should never be started without your own veterinarian involved. 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. Your own vet confirms your dog is a candidate, sets the dose from body weight, and plans the monitoring. Skipping that step means skipping the part that protects your dog.

How the prescription actually works

There are two 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. You order from a supplier such as Rapavie, guided by your own vet. Share the protocol with your own veterinarian and confirm it suits your dog before starting — and keep them in the loop for monitoring.

Either way, your own veterinarian should stand 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, or of a seller that tells you no vet is needed — that 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

• It is sold as a prescription medicine, with a plain instruction to use it only under the guidance of your own veterinarian.
• Dosing is set by your dog’s weight, not one-size-fits-all.
• The supplier is transparent about the medicine and its dosing rationale, so you can share both with your own vet.
• They are clear about who should not take it. Diabetes, active infection, significant liver disease, a planned surgery or pregnancy make rapamycin the wrong choice — rule them out with your own vet before starting.

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, see the dog therapy. Strengths follow body weight — check the strength with your own veterinarian before starting.