What to expect from antidepressants

Most people are handed a prescription, a two-minute explanation and a follow-up in four weeks. Then they go home and find that the first fortnight is nothing like what they expected, conclude the tablets are making things worse, and stop.

That sequence is extremely common and almost entirely preventable with information nobody gave them.

They take weeks, not days

The single most useful fact: antidepressants typically take two to six weeks to have a real effect on mood, and sometimes longer at a first dose.

Nobody feels better on day three. If you are judging by week one you are judging far too early, and week one is precisely when most people give up.

The first fortnight often feels worse

Side effects arrive before benefits. This is the wrong way round and it is why so many people stop.

Commonly, in the first one to two weeks: nausea, headache, feeling wired or jittery, worse sleep, vivid or unpleasant dreams, a dry mouth, appetite changes. Most of these fade. Knowing they are expected — rather than a sign something has gone wrong — is most of what gets people through.

Side effects that last longer

Some do not fade in a fortnight, and it is worth knowing they are common rather than assuming you are unusual:

• Sexual side effects. Reduced desire, difficulty finishing. Very common, frequently not mentioned by prescribers, and a legitimate reason to ask about switching. You are allowed to raise it.
• Emotional blunting. Less crushing lows, and also less of everything else. Some people find this a fair trade; others find it intolerable. Say so — it is a recognised effect and a reason to try something different.
• Weight change. Varies enormously by drug.
• Tiredness or, for others, insomnia. Sometimes fixed simply by changing the time of day you take it. Ask before assuming.

None of these are things to endure silently for a year. There are many antidepressants; the first one is a starting point, not a verdict.

Do not stop abruptly

This is the most important practical point on the page.

Stopping suddenly can cause discontinuation symptoms — dizziness, electric "zap" sensations, nausea, flu-like aching, vivid dreams, irritability, and a sharp low mood.

The trap is that this feels exactly like a rapid relapse. People stop, feel awful within days, and conclude they were far more dependent on the drug — or far more unwell — than they thought. Often what they are experiencing is withdrawal from a too-fast stop, which is a different thing with a different answer.

Coming off should be tapered, slowly, with a prescriber. For some drugs that takes months rather than weeks, and that is normal rather than a sign of addiction.

Are they addictive?

Not in the sense people usually mean. You do not crave them, you do not need escalating doses for the same effect, and they do not produce compulsive use.

Your body does adapt to them, which is why stopping abruptly causes symptoms — but that is physical adaptation, not addiction, and the distinction matters because fear of "getting hooked" stops a lot of people starting.

What they do and do not change

They do not make you a different person, and they do not manufacture happiness. The most common description from people for whom they work is not euphoria — it is that the floor stopped falling away. Things still hurt; they stop being unsurvivable.

They also do not fix circumstances. If the thing making life unbearable is debt, an abusive relationship, or a job that is destroying you, medication may make you better able to face it — it will not change it.

Money, debt and mental health →

Questions worth asking the prescriber

• How long before I should expect to notice anything?
• What are the common side effects of this one, and which should I ring about rather than wait out?
• When should I take it, and does that change if it makes me drowsy?
• What happens if I miss a dose?
• How long will I be on it, and what does coming off look like?
• Does it interact with anything else I take — including alcohol?

Write the answers down. You will not remember them.

Alcohol

Worth its own question. Alcohol is a depressant, it interacts with most antidepressants, and it undoes much of what the medication is doing.

Alcohol and low mood →

A practical safety point

If having a large quantity of medication in the house is a worry — for you or for someone who knows you are struggling — a pharmacist can often dispense smaller amounts more frequently, and a prescriber can write it that way.

Asking for that is not an admission of anything alarming. It is the same principle as everything else on this site: putting a little time and one other person between you and a bad hour.

Build a safety plan →

If it is not working

After a fair trial — usually six to eight weeks at an adequate dose — go back and say so. That is information, not failure.

The realistic picture is that finding the right medication often takes more than one attempt. Many people are on their second or third. That is normal, it is not a sign that nothing will work, and it is a very common point at which people quietly give up on the whole idea rather than going back once more.