Medically reviewed by Shahrzad Shadmani, PMHNP-BC, FNP-C, founder of Integrative Psychiatry and Wellness (IPW Health).
Published September 16, 2026.
The medication is helping. That is the frustrating part. Your mood has lifted or the panic has receded, and now you are dealing with nausea every morning, or you cannot stay awake past nine, or you feel flatter than you would like.
The question people ask at this point is usually some version of: do I have to choose?
Often, no. A great deal can be adjusted. But before the list of what can be changed, there is a shorter and more important list of what cannot wait — because the most common mistake is treating every side effect as something to ride out.
Start here: the effects that are not a “wait and see”
These are not side effects to monitor. They are reasons to contact your prescriber urgently, or to seek emergency care.
Emergent suicidal thinking after starting or changing an antidepressant. Antidepressants carry an FDA boxed warning for increased risk of suicidal thoughts and behaviors in children, adolescents and young adults up to age 24, particularly in the first weeks of treatment and after any dose change. New or worsening thoughts of self-harm, agitation, or a sudden sharp deterioration in mood during this window need same-day contact. This applies at any age, but the warning exists because the risk is concentrated in people under 25.
Serotonin syndrome. A potentially life-threatening reaction that can occur with serotonergic medications, most often when two or more are combined — including some pain medications, migraine treatments, anti-nausea drugs and over-the-counter supplements. Signs include agitation or confusion, rapid heart rate, high blood pressure, high fever, heavy sweating, muscle rigidity, tremor, exaggerated reflexes, and diarrhea. This is an emergency.
Any new rash while taking a mood stabilizer. Certain mood-stabilizing medications carry a risk of severe cutaneous reactions, including Stevens-Johnson syndrome and toxic epidermal necrolysis, which can be fatal. A new rash on these medications is treated as urgent until proven otherwise — contact your prescriber immediately, and seek emergency care if the rash is spreading, blistering, involves the mouth, eyes or genitals, or comes with fever or flu-like symptoms. Do not wait to see whether it settles.
Neuroleptic malignant syndrome. A rare but life-threatening reaction to antipsychotic medication: high fever, severe muscle rigidity, confusion or altered consciousness, unstable blood pressure and heart rate. This is an emergency.
Movement effects on antipsychotics. Muscle spasms, restlessness you cannot sit through, stiffness, tremor, or involuntary movements of the face, mouth or limbs all need prompt evaluation rather than a wait-and-see approach. Some are manageable; some become persistent if left unaddressed.
Also urgent: fainting, a seizure, a severe allergic reaction, signs of infection while on a medication that requires blood count monitoring, and any sudden change in thinking or consciousness.
The ordinary side effects — and why timing matters
With that established: most side effects are not emergencies, and many of them genuinely can be improved.
Commonly reported effects include drowsiness or difficulty sleeping, nausea or stomach upset, headache, dry mouth, dizziness, weight change, tremor, restlessness, reduced sexual interest or function, and emotional blunting — feeling less of everything, including the good parts.
The single most useful thing to know is that these do not all behave the same way over time.
Some ease over the first weeks. Nausea, headache and early jitteriness often settle as your body adjusts. This is why a prescriber may ask you to give it a defined period before judging.
Some do not. Sexual side effects, emotional blunting and weight change tend not to resolve on their own. Waiting these out is usually not the answer, and you should not assume you are expected to.
Knowing which category you are in is exactly the conversation to have — and it is a reason to raise a side effect early rather than after six months of tolerating it.
What can actually be changed
There are more options than most people realize. All of these are your prescriber’s decisions, not adjustments to make on your own.
Dose. Lower doses often produce fewer side effects, and the effective dose varies widely between people. Your prescriber may also begin a medication at a low dose and increase it gradually — that is a prescribing approach, not something to implement yourself.
Timing. A medication that causes drowsiness may be better taken in the evening; one that disrupts sleep may be better in the morning. Some are easier on the stomach with food. Timing changes are simple and frequently effective — but which way to move depends on the medication, which is why this is a conversation and not an experiment.
Formulation. Extended-release, immediate-release, liquid and other formulations of the same medication can differ meaningfully in how side effects are experienced.
Switching within the same class. Two medications in the same class can have quite different side-effect profiles. A switch within class often preserves the benefit while changing what you have to live with.
Switching to a different class. When within-class switching does not help, a different class may.
Treating the side effect directly. Some side effects have their own treatments or countermeasures rather than requiring a change to the primary medication. Whether that is appropriate depends entirely on which side effect and which medication.
Looking outside the prescription. Sleep, alcohol, other prescriptions, over-the-counter medicines, supplements, thyroid function and other medical conditions all shape how a medication is tolerated. A side effect is sometimes an interaction, and sometimes a medical problem that was already there — which is why a full medication and supplement list matters at every visit.
Never stop abruptly — and here is why
If a side effect is bad enough that you are considering stopping, call. Do not just stop.
The reason is not caution for its own sake. Three specific things can happen:
Discontinuation syndrome. Stopping an antidepressant abruptly — particularly those that clear the body quickly — can produce dizziness, nausea, flu-like symptoms, insomnia, irritability, vivid dreams, and electric-shock sensations sometimes described as “brain zaps.” This is not withdrawal in the addiction sense, and it is not dangerous in most cases, but it is genuinely unpleasant and it is avoidable with a planned taper.
Relapse. The condition the medication is treating can return, and it often returns some weeks after stopping — long enough that people do not connect the two. This is the most common and most consequential outcome of stopping abruptly.
Rebound. With some medications, symptoms return more intensely than before treatment. Abruptly stopping certain mood stabilizers is associated with rapid relapse, and with lithium specifically with rebound mania. Abruptly stopping benzodiazepines can cause severe withdrawal, including seizures, and is dangerous without medical supervision.
A planned stop is a different event from an unplanned one. Your prescriber can taper, switch, or cover the transition.
How to raise it so it gets addressed
You do not need clinical vocabulary. You do need specifics, because specifics are what change the plan:
- When it started, relative to starting or changing the medication
- What it actually feels like
- How often, and whether it follows a pattern through the day
- What it is stopping you doing — work, driving, sleep, sex, eating
- Whether you have skipped doses because of it, and how often
That last one matters more than people expect. Missed doses because of side effects are common, they are not a character failing, and a prescriber who does not know about them is working from bad information.
What to do next
If you are having any of the effects in the first section, contact your prescriber now, or go to an emergency department if the situation warrants it. If it is an ordinary side effect, raise it at your next visit — or sooner, if it is affecting whether you keep taking the medication at all.
Side effects are information about fit. They are worth reporting early, and they are usually workable.
IPW Health provides psychiatric evaluation and medication management by telehealth in California, Oregon, Washington and Colorado, and in person in Mission Viejo, California. We order and interpret laboratory work directly, including the monitoring that some psychiatric medications require.
This article is general education, not medical advice, and reading it does not create a patient–provider relationship. Treatment decisions depend on your history and should be made with a clinician who knows it.
If you are in crisis or having thoughts of harming yourself, call or text 988 to reach the Suicide and Crisis Lifeline, available 24 hours a day in the United States. If you are in immediate danger, call 911.
Sources
- National Institute of Mental Health. Mental Health Medications.
- U.S. Food and Drug Administration. Approved product labeling and boxed warnings (class level) — antidepressants, mood stabilizers, antipsychotics; Suicidality and Antidepressant Drugs.
- American Psychiatric Association. Practice Guidelines for the Treatment of Patients with Major Depressive Disorder; with Schizophrenia (antipsychotic adverse effects and monitoring); with Bipolar Disorder.
- National Institute for Health and Care Excellence (NICE). Guidance on stopping antidepressants and on medicines associated with dependence or withdrawal symptoms.
