"person with an alcohol-related disorder" covers everything from 'problem drinking' through to heavy addiction;

"person suffering from alcohol dependence" would be more specific and might be the level your text is aiming at. But if you're translating for a drug company then maybe *they* can tell you exactly what they mean...

http://cadca.org/coalitionsonline/files/lg41204.doc

http://www.suboxone.com/patients/opioiddependence/language.a...

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Note added at 1 hr (2006-05-24 09:45:52 GMT)
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A couple of answerers have suggested "abuse" and there has also been mention of "political correctness". Choosing an answer here isn't about being 'PC' or not, it's about deciding what term a native speaker working for a pharmaceutical company and writing for health professionals would be likely to use.

I believe that s/he would reject "abuse". There's some guidance on this in the first of the texts I've linked to above, a "Guide to the Use of Language" for people dealing with substance use disorders produced by the U.S. Department of Health and Human Services Substance Abuse and Mental Health Services Administration’s Center for Substance Abuse Treatment.

"Abuse
Problem with the term: Although this is a clinical diagnosis in the DSM-IV and ICD-10, this is a stigmatizing word because (1) it negates the fact that substance use disorders are a medical condition; (2) it blames the illness solely on the individual with the illness, ignoring environmental and genetic factors, as well as the drugs’ abilities to change brain chemistry; (3) it absolves those selling and promoting addictive substances of any wrongdoing; and (4) it feeds into the stigma experienced not only by individuals with substance use disorders, by also by family members and the treatment/recovery field. [...]
Preferred terminology: Misuse, harmful use, inappropriate use, hazardous use, problem use, risky use, substance use disorder"



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Note added at 1 hr (2006-05-24 10:01:40 GMT)
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(One could of course argue that these explanations/opinions are part of the process of looking at language use that some people regard as "political correctness". I wouldn't dispute that - but I was citing it as evidence of current usage among healthcare professionals, not taking a position on the arguments set out. That we do not need to do.