Cannabis users face more pain after surgery than those who do not use the drug — and they need more painkillers, a study has found.

Many Americans take medical marijuana to help relieve pain from urinary and digestive problems among other conditions.

Researchers at the Cleveland Clinic analyzed pain and opioid records from 35,000 patients a day after surgery. 

It included 1,600 people who had used marijuana at least a month before their operations, but not for chronic or long-term pain. In Ohio, where the clinic was based, it is only legal to use the drug for medical reasons.

Cannabis users — whether smoking, eating or taking it as pills — experienced 14 per cent more pain over the day after surgery, researchers found.

They were also received seven per cent more opioids to help ease pain, Jasa pendirian pt tangerang although this was not significantly higher than in the other group.

Dr Elyad Ekrami, a clinical research fellow involved in the study, said the study underlined the importance of telling doctors whether you use cannabis.

He said patients should not stop taking it before surgery unless advised by their doctors.

Cannabis lobbyists today told DailyMail.com that patients should follow the advice of their doctors.

Experts suggest cannabis may lead to more pain after surgery because users may be unable to take it in hospital, leaving them suffering more pain.

But it could also be because the drug makes pain receptors less sensitive, meaning more opioids are required to reduce the experience of pain.

Doctors have been aware that cannabis use can leave patients suffering more pain after surgeries for years.

But this study is believed to be the first large-scale paper to detect the effect.

The retrospective paper was presented today at the annual meeting in New Orleans, Louisiana.

For the paper scientists combed through the Cleveland clinic database of elective surgery from 2010 to 2020.