Buprenorphine is an alternative to methadone that reduces the symptoms of withdrawal and lessens the desire to use heroin.
It is estimated that more than 30,000 people in England use the drug, which offers a reduced risk of overdose compared with methadone.
A clinic run by the rehabilitation charity Addaction saw the price it was paying for of the drug rise by 745%.
It said providers of substance misuse treatment were now having to work out whether they could afford to prescribe buprenorphine.
It warned that any move to switch recovering addicts from buprenorphine could result in disengagement in treatment and increases in drug-related deaths.
“We already have record deaths from drug misuse, while treatment services have been slashed by millions in recent years,” he said.
We should not be in a situation where this kind of generic medicine is subject to supply problems. »