Alcohol and mood

Alcohol is used by a large proportion of adults specifically to manage stress, anxiety and low mood, which is understandable and which produces a predictable second-order problem.

What it does acutely

It enhances GABA activity, which is inhibitory, producing relaxation and reduced anxiety.

It also affects glutamate, dopamine and serotonin systems.

The subjective effect in the first hour or two is genuinely anxiolytic, which is why it works and why the habit forms.

What happens afterwards

As blood alcohol falls, the nervous system rebounds in the opposite direction.

The result is a period of increased excitability — anxiety, restlessness, poor sleep, raised heart rate — that outlasts the sedative phase considerably.

This is the mechanism behind next-day anxiety, which is frequently attributed to something said or done the previous evening and is substantially pharmacological.

Layered on top: fragmented sleep, dehydration, blood glucose fluctuation and a depleted state that makes everything feel worse.

Which means the net effect on anxiety over twenty-four hours is negative even when the effect over two hours was positive.

The loop

The next-day anxiety is relieved by drinking again, which is how a coping strategy becomes a maintaining factor.

Tolerance means the amount required to produce the initial relief increases.

And the underlying problem — whatever the drinking was managing — remains unaddressed, since alcohol postpones rather than resolves.

This is a slow process measured in years rather than a dramatic one, which is why people who never intended to drink much find themselves drinking daily.

Alcohol and depression

The association is strong and bidirectional.

Alcohol is a depressant and heavy use produces depressive symptoms directly, which frequently resolve substantially within weeks of stopping — meaning some people diagnosed with depression have a substance-induced mood disorder that improves without antidepressants.

Depression also increases drinking, so untangling which came first requires a period of abstinence to observe.

Clinically, treating depression while heavy drinking continues produces poor results, which is why services generally address both together rather than sequentially.

And the interaction with suicide risk is significant, since alcohol is disinhibiting and is present in a large proportion of self-harm presentations.

How much is a problem

Guidelines in most countries express low-risk drinking in weekly units or standard drinks, with the important caveats that the guidance describes low risk rather than no risk, and that risk is continuous rather than stepped.

Advice has shifted in several countries towards lower thresholds as the evidence on cancer risk has strengthened; the previously reported cardiovascular benefits of moderate drinking have been substantially undermined by better-designed studies that account for the tendency of sick people to stop drinking.

The practical markers of a problem are behavioural rather than numerical: drinking to cope, drinking alone, needing more for the same effect, being unable to stop once started, planning around it, and continuing despite consequences.

Cutting down

Practical steps with evidence.

Count accurately for two weeks, since almost everyone underestimates substantially.

Set specific drink-free days rather than a vague intention to drink less.

Remove it from the house, since availability predicts consumption.

Identify the trigger it is being used for and substitute something, since removing a coping strategy without replacing it fails.

Change the environment and the routine, since drinking is heavily cue-driven.

Tell someone, which improves outcomes measurably.

And expect sleep and mood to worsen for a week or two before improving, which is the phase where most people conclude it was helping after all.

The safety point

Which must be stated plainly.

Anyone who is physically dependent — drinking daily and heavily, experiencing shaking, sweating or nausea in the morning, drinking to relieve those symptoms — should not stop abruptly without medical supervision.

Alcohol withdrawal in dependence can cause seizures and delirium tremens, which are medical emergencies.

Medically assisted withdrawal is available and safe, and this is one of the few situations where seeking help before making a change is genuinely essential rather than merely advisable.

What improves when it goes

Reported consistently by people who stop or substantially reduce.

Sleep quality, within weeks.

Baseline anxiety, which many people are surprised to discover was largely generated by the drinking.

Mood stability.

Energy.

And a clearer view of whatever the drinking was managing, which is uncomfortable and is the point.

General information only, not medical advice. Consult a qualified clinician about alcohol use, and do not stop drinking abruptly if you are physically dependent.