A blow to the head seldom confines itself to the week it happened. People report the aftermath in fragments: a headache that never fully clears, patience that runs out sooner in traffic, ordinary noise that suddenly grates, and a dullness that was absent before the fall or the wreck. Mood belongs on that list as well. It usually goes unmentioned, partly because saying it out loud sounds like grumbling about life rather than reporting a symptom, and partly because whatever was visible closed over long before anyone named the change in mood.
One narrow question drives this page. Suppose a head injury sits somewhere in your past and depression is what you are being treated for today: what does that past change about the order in which treatments get attempted? The honest answer is quieter than most people expect, and more practical. Nothing here is medical advice; it is background for an appointment.
Why the injury belongs in the conversation
A timeline is the first thing the injury supplies. Should your mood have changed during the weeks or months after the event, say so plainly at the start of the visit, with approximate dates, rather than letting it surface halfway through. What came earlier changes how any clinician weighs what came later.
Overlap is the second thing, and it arrives as a caution. Broken sleep, thinking that feels slower, a short temper, words that will not come, flat energy, and eyes that object to bright light can trail an injury, can belong to a depressive episode, or can be produced by both running together. Because each of those situations calls for a different response, separating them is practical work rather than a technicality. Expect questions about which hours of the day are worst, whether pushing yourself physically sets the symptoms off, and what is different now compared with the first month after the event. Sorting happens that way.
Third is a point about risk, and it needs careful wording. Among the factors a clinician weighs when an opening antidepressant falls short, a knock to the head years ago is one of them. Elevated odds are not a diagnosis, and by themselves they entitle nobody to any particular therapy. What they do buy is closer follow-up, plus an understanding settled in advance of what happens if the first try underwhelms. No step gets skipped, and the sequence gets no shorter.
What the usual first line looks like
Most adults begin with two things at once rather than one. A structured course of talk therapy, with cognitive behavioral therapy among the common choices, runs alongside a first antidepressant, typically an SSRI or an SNRI. A thorough clinician also goes hunting for the dull variables that quietly hold symptoms in place: how you sleep, how much you drink, thyroid function, pain, iron, and whatever else is already in your medicine cabinet.
Two details slip past people in that opening appointment, and both are closer to arithmetic than biology: how much, and for how long. A medication left at its introductory dose, or abandoned on day ten because nothing felt different yet, has not actually been tested. What most prescribers want before forming an opinion is several weeks spent at a dose that counts. Knowing that in advance takes some of the bewilderment out of the wait.
Pacing often shifts somewhat when an injury sits in the record. A prescriber may open lower and climb more gradually, since dizziness, fog, and headache are difficult to attribute when versions of them were already present. Balance trouble, sleep apnea nobody has treated, any seizure in your history, and care you are still receiving for the injury itself all influence what gets written and in what sequence. It is worth the small effort to make sure whoever handled your injury and whoever handles your mood know about the other.
When the first attempts are not enough
Suppose two honest antidepressant attempts, each dosed properly and each given long enough to declare itself, still leave you well short of where you want to be. The phrase you are likely to hear next is treatment-resistant depression. It describes the route so far, nothing more. It passes no judgment on your character, and it does not mean the options have run out. Ordinarily the menu widens instead: an add-on medication alongside the prescription you already take, transcranial magnetic stimulation, ketamine given under clinical supervision, the esketamine nasal spray Spravato under its REMS program, electroconvulsive therapy in the more severe presentations, and at times a slot in a research study.
Be wary of anybody who frames one of these as aimed at the injury itself. None of them carries that indication. The target is depression in a person whose history happens to include a blow to the head, and saying it plainly that way is simply accurate. A good consultation can name what is being treated, what will be tracked week to week, who watches for side effects, and what the fallback is when the response falls flat.
Does your own story start with a wreck or a fall? If so, the ground such a consultation tends to cover is sketched reasonably well in one clinic's write-up on mood that changed after an injury. Keep in mind whose words those are. Use them to sharpen what you intend to ask, never to settle anything.
What to bring with you
Put on paper the date of the injury, the way it happened, whether consciousness was lost, and the name of whoever assessed you at the time. Underneath that, list every depression treatment you have attempted, each with its dose and an approximation of how many weeks or months it lasted, the ones you walked away from included. Describe what the past month of sleep has looked like. Decisions come out better when that material sits in front of a clinician instead of being reassembled aloud under time pressure, and you avoid arguing for your own history from nothing.
There is nothing strange about asking early what the whole sequence looks like, even while standing on its first rung. The question of what happens if this attempt fails belongs to you, and an answer should already exist before the moment you need it. Should you reach a point where you are in danger, or where hurting yourself starts to feel like an option, 988 takes both calls and texts inside the United States and will put a trained counselor on the line right away.