Bouts of depression are often the direct result of alcohol intake, according to a study in the March issue of the Journal of Studies on Alcohol and Drugs. In a February 12 preview of the article, the researchers linked alcohol abuse and the disease of alcoholism to a third of depressive episodes. These periods of depression are different than depressive episodes caused by other life events.
Experts have long known that heavy drinking can spur temporary episodes of depression while many with alcohol use disorders use alcohol to relieve depression. They self-medicate. "I don't know that the average person realizes that heavy drinking can induce mood problems," said lead researcher Marc A. Schuckit, M.D., of the University of California, San Diego School of Medicine.
Not every doctor might be aware of it, either. But it's important that he or she pay close attention to this problem, Schuckit said, because depression caused by heavy drinking has a different prognosis and is treated much differently from depression not tied to drinking. “Although the symptoms of independent and substance-induced depressions can be identical, if the sadness develops in the context of heavy drinking, the symptoms are likely to lift within several weeks to a month of abstinence and rarely require antidepressants to go away.
“It's important for doctors to consider alcohol use disorders as a possible cause of patients' depression symptoms,” Schuckit said—rather than simply "reaching for the prescription pad" and recommending an antidepressant." The patient needs to be forthcoming with information about alcohol use in order for the physician to properly diagnose the source of the depression.
The 30-year study evaluated nearly 400 men who were 18 years old at the outset. About half were at increased risk for drinking problems because their fathers were alcoholics. Over three decades, about 41 percent of the men with alcoholic fathers developed alcohol abuse or alcoholism, and nearly 20 percent suffered at least one bout of major depression. For men with alcohol problems, though, almost one third of those major depressive episodes were seen only while they were drinking heavily, not depression caused by other life events.
If alcohol is the cause, according to the journal, the depression is very likely to disappear with abstinence.
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