Feeling Worse on a New Psychiatric Medication?

If you started a new psychiatric medication in the last week or two and you feel worse — more anxious, queasy, wired, foggy, or lower than before — you are describing early effects that patients commonly report with these medications, and that often ease as the body adjusts. But not every early symptom is adjustment: a few are warning signs, and they mean you should call your prescriber the same day. This article walks through which is which, why the first weeks are often the hardest stretch, and the specific warning that applies to anyone under 25.

Why do the first two weeks feel worse than before I started?

Because side effects and benefits run on two different clocks.

Most antidepressants and anti-anxiety medications — SSRIs like sertraline or escitalopram, SNRIs like venlafaxine or duloxetine — change chemical signaling in your body almost immediately. But the parts of that signaling you can feel right away are mostly the unwanted ones. Serotonin receptors don't live only in the mood circuits of your brain; they're also in your gut, your sleep systems, and the pathways that regulate arousal and alertness. Change the signal and the gut notices first: nausea, appetite changes, headaches, restlessness, and disrupted sleep tend to show up within days.

The benefit — steadier mood, less dread, fewer spirals — depends on slower changes. Your brain adapts to the new level of signaling over weeks, and it is that gradual adaptation, not the immediate chemical shift, that is believed to drive improvement. So there is a window, often the first one to three weeks, where you are paying the cost of the medication without yet collecting the benefit. That window is where many people quit — sometimes right before things would have started to turn.

Knowing the window exists doesn't make it comfortable, but it changes the question from "this medication is hurting me, I should stop" to "is what I'm feeling the expected rough patch, or a real warning sign?" The next two sections answer that.

Which early side effects are expected and usually settle?

These are the effects prescribers hear about most often in the first one to two weeks. Uncomfortable, yes; alarming, usually not — and most fade as your body adjusts:

• Nausea or an unsettled stomach. Often improves if you take the dose with food.
• Headaches.
• Feeling jittery, keyed-up, or restless — sometimes called "activation." Common with SSRIs, especially early on.
• Sleep changes. Trouble falling asleep, waking early, or unusually vivid dreams. If you're in treatment for trauma, vivid dreams can be genuinely distressing — bring them up at your follow-up rather than waiting.
• A temporary increase in anxiety. Frustrating when anxiety is the very reason you're taking the medication; more on this below.
• Dizziness, dry mouth, sweating, or a mild change in appetite.
• Feeling emotionally flat or "off." Sometimes an early adjustment effect; if it persists, it's worth a conversation about dose or medication choice, not something to just live with.

Stimulants prescribed as part of medication treatment for ADHD behave differently — they work within hours, and their common early effects (reduced appetite, trouble sleeping, feeling edgy as the dose wears off) are usually dose-and-timing problems to solve with your prescriber rather than something to wait out.

Two honest caveats. First, "usually settles" means over days to a couple of weeks — a side effect that is getting steadily worse rather than better is a call, not a wait. Second, some effects, such as sexual side effects, often don't fade on their own; they're a reason to talk with your prescriber about options, not a reason to quietly stop taking the medication.

Which symptoms mean I should call today, not wait?

None of the following is normal adjustment. Call your prescriber the same day — and if it's after hours or you're in danger, use the crisis resources below.

• New or worsening thoughts of suicide or self-harm. Any of it, at any age. Don't rank it, and don't wait to see if it passes.
• Agitation you can't sit still through — pacing, an unbearable internal restlessness, a feeling of wanting to crawl out of your skin. This can be a side effect called akathisia, and it needs a medication change, not toughness.
• A sudden surge of energy, racing thoughts, a dramatically reduced need for sleep, or feeling abnormally "up." In some people, an antidepressant can trigger a hypomanic or manic episode, which can point toward bipolar disorder rather than depression alone. That changes the treatment plan, so your prescriber needs to know quickly.
• Signs of a serious reaction. High fever, rapid heartbeat, muscle stiffness or twitching, confusion, and heavy sweating can indicate serotonin syndrome, a medical emergency. Rash, hives, swelling of the face or throat, or trouble breathing can indicate an allergic reaction. For either, call 911 or go to the nearest emergency room.
• Severe insomnia — not "took a while to fall asleep," but barely sleeping for several nights running.
• New confusion, hallucinations, or feeling detached from reality in a way that is not familiar to you.

If you are in crisis right now: call or text 988, the Suicide & Crisis Lifeline, available 24/7. If you or someone else is in immediate danger, call 911 or go to the nearest emergency room. You do not have to be certain it's "bad enough." That is what these lines are for.

What's the warning for people under 25?

Plainly: the FDA requires antidepressants to carry a boxed warning because children, adolescents, and young adults under 25 have an increased risk of suicidal thoughts and behaviors when starting an antidepressant or changing the dose. The risk is highest in the first weeks of treatment and around dose changes.

This does not mean young people shouldn't take antidepressants — untreated depression carries its own serious risks, and for many young people medication is an important part of getting well. It means the early weeks require real monitoring, not a follow-up months away.

If you're under 25 and starting a medication, or you're the parent of someone who is:

• Expect closer follow-up during the first month. If it hasn't been offered, ask for it.
• Tell someone you trust that you're starting a medication and ask them to check in with you.
• Treat any new thoughts of self-harm, unusual agitation, rage, or impulsivity as a same-day call to the prescriber — and if you're in crisis, call or text 988, the Suicide & Crisis Lifeline, available 24/7.
• Don't stop the medication abruptly on your own; call first. (The section on stopping below explains why.)

Why did my anxiety get worse when I started an SSRI?

One common explanation — and one of the first things a prescriber will consider — is the activation effect described above: the jittery, keyed-up feeling SSRIs can cause in the early weeks. It lands hardest on people starting medication as part of treatment for anxiety or for OCD, because it feels exactly like the problem getting worse. Only your prescriber can sort out what's actually happening in your case, which is one more reason to report it rather than ride it out in silence.

When activation is the cause, it comes from a different process than the medication's eventual benefit, on a different timeline — and prescribers often start at a low dose and increase slowly precisely to soften this stretch. Sometimes a short-term bridging medication is added for the first weeks. If your anxiety spike is severe, escalating day over day, or comes with any of the red flags above, call — otherwise, tell your prescriber at your next visit so the plan can be adjusted.

What if I'm tempted to stop because it isn't helping yet?

Feeling worse in the first days tells you nothing about whether the medication will eventually help. For most antidepressants at an adequate dose, meaningful improvement takes weeks rather than days — we've written a separate guide to how long antidepressants take to work if you want that timeline in full. What matters here is that judging the medication at day ten is judging it before it has had a fair chance, which is why starting a medication should be one part of a broader treatment plan for depression with scheduled follow-up rather than a prescription and a goodbye. Improvement, when it comes, often arrives quietly — sleeping a bit better, snapping less, one afternoon that felt almost normal — before you'd call yourself "better."

One thing not to do: stop abruptly on your own. Many of these medications cause discontinuation symptoms when stopped suddenly — dizziness, "brain zap" sensations, flu-like feelings, irritability, rebound anxiety — which are easy to mistake for relapse and can make the whole situation harder to read. If you want off a medication, that is always your right; do it with a taper plan rather than a hard stop.

What actually helps during the first two weeks?

• Take it with food, at the same time each day. Consistency reduces stomach upset and makes side effects easier to interpret.
• Skip alcohol. It muddies the picture and can worsen both side effects and the symptoms you're treating.
• Don't add supplements without asking. St. John's Wort in particular can interact dangerously with serotonergic antidepressants.
• Keep a short daily note. One line on sleep, anxiety, mood, and side effects turns a vague "it's been rough" into something your prescriber can act on.
• Keep the follow-up appointment — whether you feel better, worse, or nothing at all. All three are useful information.
• Tell one person. Someone who sees you regularly may notice a change — good or concerning — before you do.
• Lower the bar for everything else. The adjustment period is temporary; treat it like recovering from a minor illness rather than a stretch when you should be performing at full capacity.

Frequently asked questions

Should I just stop taking it if I feel worse?

No — call your prescriber first. Stopping abruptly can cause discontinuation symptoms and can leave the underlying condition untreated, and often the fix is a dose change, a timing change, or a switch rather than quitting. The exceptions are emergencies: signs of an allergic reaction or serotonin syndrome mean emergency care now, not a scheduled call.

Do side effects mean the medication is working?

No. Side effects tell you your body has noticed the medication, not whether it will help. People with rough first weeks sometimes do very well, and people with no side effects at all sometimes see no benefit. Neither direction predicts your outcome.

Is it normal to feel more emotional or tearful at first?

Some people do notice feeling rawer or more tearful in the early weeks, and for many it settles with the other adjustment effects. If it deepens instead of settling, or comes with hopelessness or thoughts of self-harm, that's a same-day call — and 988 if you're in crisis.

What if I miss a dose during the first weeks?

Generally, take it when you remember unless it's close to your next dose — and never double up. Some medications are more sensitive to missed doses than others, so ask your prescriber or pharmacist what to do for your specific one, ideally before it happens.

Could feeling worse mean my diagnosis needs another look?

Sometimes, yes — and that's information, not failure. For example, a strong "up" reaction to an antidepressant can prompt a closer look at bipolar disorder, which calls for a different medication approach. This is one of the reasons early follow-up matters: how you respond in the first weeks helps your prescriber refine the plan.

Will my follow-up visits during this period be covered?

Coverage depends on your specific plan, so it's worth confirming before your visit. You can review the insurance plans we accept and contact your insurer with questions about copays for follow-up appointments.

I started this medication with another prescriber — can I still be seen?

Yes. If you're struggling in the early weeks and don't feel supported where you started, you can book an initial evaluation and bring your current medication list; our clinicians can review where you are and what to try next. Until you've been seen, don't stop or change the dose on your own.

---

This article is for educational purposes only and is not medical advice, a diagnosis, or a substitute for care from a licensed clinician. Never start, stop, or change a psychiatric medication without talking to your prescriber. If you are in crisis, call or text 988 (the Suicide & Crisis Lifeline) or call 911.