By the time most veterans get told that a medication is not working, they have already figured it out. You gave the first one a fair run. The second came with a dose increase and a promise that six weeks would tell the story. Somewhere around the third or fourth you stopped reporting much, because the honest answer was that nothing had really changed and saying so out loud felt like complaining about free care. Plenty of people land exactly there, and the list of approaches that exist runs well past whatever your chart already shows.
The first useful thing to know is that the situation has a name. Once a couple of antidepressants have each had a genuine run at a genuine dose and the mood has barely shifted, the depression gets labeled treatment resistant. The words sound like a verdict about you. They are really a label for a branch point in the decision tree, and they are the words that open the door to options that do not get mentioned at step one. In STAR*D, a large trial that followed ordinary outpatients through one treatment step after another, roughly one in three participants had still not reached remission after four sequential steps, as reported in the 2006 American Journal of Psychiatry summary of the trial.
What counts as a fair trial, and why it matters first
Before anyone moves on to something new, it is worth auditing what has actually been tried. Write out each medication, the highest dose you reached, how many weeks you stayed at that dose, and why it stopped. This takes twenty minutes and it changes conversations. A surprising number of medication lists that look long turn out to be short: three names, two of them stopped inside two weeks because of nausea or because a deployment, a move, or a pharmacy gap interrupted the refill.
That audit protects you in both directions. If a drug never got a real run, repeating it properly is a reasonable next move rather than a step backward. If four drugs did get a real run, you now have documentation, and documentation is what a specialist needs in order to consider anything beyond another prescription from the same family.
What usually comes up next
There is no single path, and the order depends on your history, your other conditions, and what you are willing to do. Switching to a different class is common, and so is augmentation, which means keeping the current antidepressant and adding something that works differently, lithium and certain thyroid medication and some second generation antipsychotics among them. Transcranial magnetic stimulation is a noninvasive outpatient option delivered in a series of daily sessions over several weeks, and it is available through many VA medical centers. Older medications including the monoamine oxidase inhibitors are still on the table for some people, though they come with dietary rules that require real commitment. Electroconvulsive therapy remains the most studied option for severe cases and is nothing like its reputation in film.
Then there is the ketamine family, which is why a lot of people end up reading pages like this one. Spravato, the esketamine nasal spray, is dispensed only under its REMS program, which means it is given in a certified setting where you stay for monitoring afterward and cannot drive yourself home. Its labeling covers treatment resistant depression in adults taken together with an oral antidepressant. Plain ketamine, delivered as an infusion, is prescribed for depression outside its approved labeling, a legal and widespread practice that nonetheless leaves insurance coverage patchy and clinic standards uneven. Both are medical treatments with real contraindications, including blood pressure problems and certain psychiatric histories, and both require someone to actually evaluate you rather than sell to you.
Who should be doing the evaluating
The person deciding this should be able to see your whole record, not just the last six months. They should be a prescriber, they should be willing to read your medication audit line by line, and they should ask about three things that are easy to skip: sleep, alcohol, and head injury. Sleep apnea and heavy drinking both produce something that looks exactly like depression and neither one responds to a dose increase. And a history of blasts, falls, fights, or crashes that left you dazed belongs in the record, because head injury is among the factors associated with depression that resists medication.
Be careful with that last point, because it gets twisted in marketing. An injury history is a risk factor, a reason for a more careful look at the whole case and a reason not to assume another SSRI will do it. Standing alone it qualifies nobody for infusions, for a nasal spray, or for anything else. If a clinic tells you that your TBI history makes you a candidate for infusions, you have learned something about the clinic.
Practically, that usually means asking your primary care team for a referral to a mood specialist rather than trying to have this conversation in a fifteen minute visit, or requesting a second opinion if the answer stays put. If you want to see how an outside clinic presents this to veterans before you call anyone, Brain Recovery Centers publishes a page aimed at veterans who have been through several medications, and reading it costs nothing.
One last thing, said plainly. The fact that four medications did not do much says something about those four medications and very little about your odds with a different approach. Bring the list, bring the dates, and ask what is next rather than whether anything is. That one change in the question tends to change the answer you get.