They use a much smaller dose than is used recreationally.<p>Here&#x27;s someone who was using 15 g per day: <a href="http:&#x2F;&#x2F;www.bbc.co.uk&#x2F;newsbeat&#x2F;article&#x2F;29811499&#x2F;k-bladder-the-uks-secret-ketamine-epidemic" rel="nofollow">http:&#x2F;&#x2F;www.bbc.co.uk&#x2F;newsbeat&#x2F;article&#x2F;29811499&#x2F;k-bladder-the...</a><p>A therapeutic dose is 5 mg per kg.  An average adult would be 80 kg, which gives a dose of 400 mg once every maybe 30 or 60 days.