The head of a drug rehabilitation facility has claimed it is being prevented from treating Scottish patients, and raised concerns about Scottish government drug policy.

Peter McCann, chair of Castle Craig in Peebleshire, said NHS referrals were at a “pitiful level” and patients faced obstacles to receive in-patient or residential treatment.

Mr McCann also said it was “bizarre” to say that the Scottish government does not promote one form of treatment over another considering the amount reportedly spent on methadone.

He outlined his concerns in a letter to Scottish Conservative leader Annabel Goldie, and asked her to raise the matter with the government.

He wrote: “NHS referrals are at a pitiful level and every obstacle is put in a patient’s way from receiving in-patient or residential treatment.

“We hear time and again reports that nurses of drug workers tell their patients that they cannot have this kind of treatment and GPs are given the same message. So they give up.”

He added: “Our foreign income amounts to about £5 million per year. However our primary business is to treat Scots and this is what we are prevented from doing.”

The Scottish government established the Drugs Strategy Delivery Commission (DSDC) in December last year to assess independently the government’s progress in delivering Scotland’s drugs strategy, The Road to Recovery.

A government spokesperson said: “Our record increased funding for drug treatment services and significant success in dramatically bringing down treatment waiting times are making the Road to Recovery a reality; now and for the future.

“It is heartening to see that more people are accessing treatment and support to help them recover from their drug problems, and it is wrong to infer that a decline in referrals to residential services by the NHS is as a result of people being ‘parked’ on methadone.”