Europe South Asia Asia Pacific Americas Middle East Africa BBC Homepage World Service Education

Front Page



UK Politics







Talking Point

In Depth

On Air

Low Graphics

Wednesday, July 21, 1999 Published at 23:24 GMT 00:24 UK


Scientists crack cocaine craving

New compound may combat cocaine addiction

Scientists have developed a compound that may be able to reduce drug craving in cocaine addicts.

The compound has been tested successfully on cocaine-dependent rats.

Scientists are hopeful it can eventually be given to humans to decrease their desire for drugs, and to reduce the risk of relapse after withdrawal.

Currently only substitution treatments - methadone, SubutexR or nicotine patches - are available for drug misusers.

These treatments have limited impact and do not tackle the craving for drugs. Instead they simply replace one craving with another.

The new compound, known as BP 897, works by stimulating the release of the chemical dopamine in the area of the brain that governs drug dependence.

Dopamine produces a feeling of pleasure and euphoria, which helps to offset the cravings for cocaine, without producing the same addictive qualities as the drug.

However, the BP 897 only works before cocaine is taken, it does not stop cravings afterwards.

Cocaine-dependent rats

BP 897 was tested on cocaine-dependent rats trained to self-administer the drug by pressing a lever.

The rats were conditioned to respond to a light which came on at each drug intake.

They continued to press the lever when the light came on, even when no drugs were released.

When the rats were given low doses of BP 897 they became less likely to keep pressing the lever, indicating that the compound had reduced their craving for drugs.

Writing in the journal Nature, the researchers, led by Dr Pierre Sokoloff at the French National Institute for Health and Medical Research (INSERM), say that BP 897 could be used to combat other forms of dependence, for example to heroin or nicotine.

Dr Sokoloff said: "There is a very strong parallel between the animal model we used and what is observed in humans.

"Currently we have only tried cocaine but as the drug acts on the common mechanism that leads to every drug abuse we think it could also be useful in treating smoking or heroin abuse."

The researchers plan to begin trials of the drug on human volunteers in September.

There is a possible risk that BP 897 may have limited side effects on memory and movement.

Advanced options | Search tips

Back to top | BBC News Home | BBC Homepage | ©

Health Contents

Background Briefings
Medical notes

Relevant Stories

16 Jun 99 | Health
Scientists develop cocaine vaccine

01 Jun 99 | Health
Cocaine increases heart attack risk

03 Feb 99 | Health
Addicts fail drugs test

Internet Links

French National Institute for Health and Medical Research (French and English)



The BBC is not responsible for the content of external internet sites.

In this section

Disability in depth

Spotlight: Bristol inquiry

Antibiotics: A fading wonder

Mental health: An overview

Alternative medicine: A growth industry

The meningitis files

Long-term care: A special report

Aids up close

From cradle to grave

NHS reforms: A guide

NHS Performance 1999

From Special Report
NHS in crisis: Special report

British Medical Association conference '99

Royal College of Nursing conference '99