Mild side effects like nausea, headaches, or a few bad nights of sleep are common in the first week or two of a new medication. Most fade on their own.
Call your prescriber if something is severe, getting worse, or making daily life hard. Call 911 for chest pain, trouble breathing, or thoughts of harming yourself.
You picked up the prescription. You took the first dose. Now your stomach feels off, you’re wired at midnight, and you’re wondering, “Is this normal? Should I stop?”
Almost everyone asks that. It’s a good question.
Here’s how to sort it out.
In this article:
- Why side effects happen
- Which ones are usually normal
- Which ones need a call
- Emergency warning signs
- Why you shouldn’t just quit
- How to track what you feel
- How your prescriber can help
Why Do Medications Cause Side Effects?
Psychiatric medications work on brain chemicals like serotonin, dopamine, and norepinephrine. But those same chemicals are active in other parts of your body too. Your gut. Your heart. Your sleep system.
So when your brain adjusts, other systems can grumble.
A few things shape how you react:
- Which medication you take, and the dose
- Your age and body
- Other medications and supplements
- Your health conditions
- Caffeine, alcohol, and how well you sleep
Two people can take the same pill and feel totally different. That’s normal.
Which Side Effects Are Usually Normal?
Some show up when you start or change a dose. They’re annoying, but they’re often temporary.
For many people, these ease within one to two weeks:
- Mild nausea or an upset stomach
- Headache
- Dry mouth
- Feeling sleepy or tired
- Trouble falling asleep
- Dizziness when you stand up
- Loose stools or constipation
- Feeling jittery or restless
- A short bump in anxiety
That last one surprises people. With some antidepressants, anxiety can feel a bit worse before it gets better. If it’s mild and settling, it’s often part of the adjustment. If it’s intense, call.
How Can I Make the First Weeks Easier?
Small tweaks can help. Check with your prescriber first if you’re not sure.
- Take it with food if your stomach is upset (unless told otherwise)
- Take it at the same time every day
- Sleepy on it? Ask if evening dosing is okay
- Wired on it? Ask if morning is better
- Drink plenty of water
- Go easy on caffeine and alcohol
- Take a short walk
Which Side Effects Need a Call?
Not everything is an emergency. But some things shouldn’t wait.
Call your prescriber if:
- A side effect is bothering you a lot or getting worse
- It hasn’t improved after a couple of weeks
- It’s getting in the way of work, school, sleep, or relationships
- You’re gaining or losing weight fast
- You have sexual side effects, like low desire or trouble reaching orgasm
- You’re so drowsy you can’t function
- You feel flat or emotionally numb
- Your anxiety, agitation, or irritability is intense
- You’re barely sleeping
- You notice new tremors or muscle stiffness
- You feel like the medication isn’t working
Yes, that includes the stuff that feels awkward to say out loud. Sexual side effects are one of the top reasons people quietly stop their medication. Your prescriber has heard it all, and there’s often an easy fix.
Quick Reference: Normal vs. Call vs. Emergency
| Category | Usually Normal | Call Your Prescriber | Get Emergency Help |
| Stomach | Mild nausea, loose stools early on | Vomiting that won’t stop, severe stomach pain | Vomiting blood, black stools |
| Sleep | A few rough nights | Weeks of poor sleep, or sleeping all day | Barely sleeping with racing thoughts and high energy |
| Mood and anxiety | A short bump in jitters | Intense anxiety, agitation, or feeling numb | Thoughts of harming yourself or others |
| Body | Mild headache, dry mouth | Tremor, weight changes, sexual side effects | Chest pain, fainting, seizure |
| Skin | Nothing | Mild rash | Hives, swelling of face or throat, blistering rash |
| Heart and temperature | Nothing | Racing heart that won’t settle | High fever with stiff muscles, sweating, confusion |
What Are the Emergency Warning Signs?
Call 911 or go to the nearest ER if you have:
- Thoughts of suicide
- Thoughts of harming yourself or someone else
- Trouble breathing
- Swelling of your lips, tongue or throat
- A severe or blistering rash or hives all over
- Chest pain
- Fainting or a very fast or irregular heartbeat
- A seizure
- Signs of serotonin syndrome: agitation, sweating, fever, racing heart, muscle twitching or stiffness, diarrhea, confusion
- Sudden intense energy with almost no need for sleep, racing thoughts, or reckless behavior, especially after starting an antidepressant
If you’re in emotional crisis or having thoughts of suicide, you can also call or text 988 any time.
A note for parents: Antidepressants carry a warning about a possible increase in suicidal thoughts in children, teens, and young adults, especially early on or after a dose change. Watch for new or worse agitation, mood shifts, or talk of self-harm. If you see any of it, call right away.
Should I Stop My Medication If I Get Side Effects?
Please don’t stop on your own. This one matters.
Quitting suddenly can cause discontinuation symptoms, which can feel like withdrawal:
- Dizziness
- Nausea
- Flu-like aches
- Irritability or low mood
- Odd electric-shock sensations
- Trouble sleeping
- Your original symptoms coming back, sometimes stronger
Some medications need to be tapered slowly. Your prescriber can plan that safely.
If the side effects are too much, call. Don’t tough it out in silence. There’s almost always something we can adjust.
How Long Do Side Effects Last?
It depends. As a rough guide:
- Early side effects: often ease in one to two weeks
- Full benefit: commonly takes several weeks, so don’t judge it too soon
- Side effects that stick around: worth a conversation, not a guess
A dose change can bring side effects back for a little while. Your body just needs to adjust again.
Different Medications, Different Side Effects
Every medication is its own thing. This is a loose overview, not a full list. Your prescriber will go over yours.
Here is your information organized into a clear table, with the closing note included below:
| Type | Common Early Side Effects | Worth Mentioning |
| Antidepressants (like SSRIs) | Nausea, headache, sleep changes, jitteriness | Sexual side effects, weight changes, feeling emotionally blunted |
| Anti-anxiety medications | Drowsiness, dizziness | Feeling dependent, memory fog |
| ADHD stimulants | Lower appetite, trouble sleeping, faster heartbeat | Mood changes, headaches, stomachaches |
| Mood stabilizers | Tiredness, stomach upset, tremor | Blood tests, rash, weight changes |
| Antipsychotics | Drowsiness, dry mouth | Weight, blood sugar, restlessness, muscle stiffness |
Some medications also need regular blood work. Keep those appointments. They catch problems early.
How Can I Track My Side Effects?
A simple log makes your next visit far more useful. For two weeks, jot this down daily:
Bring it with you. It helps your prescriber spot patterns, like “it’s worse when I skip breakfast.”
What Should I Tell My Prescriber Before Starting?
Come prepared. Share:
- Every medication, vitamin, and supplement you take, including St. John’s wort and over-the-counter products
- Allergies and past reactions to medications
- Whether you’re pregnant, planning to be, or breastfeeding
- How much alcohol, caffeine, nicotine, or cannabis you use
- Family history of heart problems, bipolar disorder, or medication reactions
- Past medications that worked or didn’t
Mention any other doctors you see, too. Some medications interact.
Questions to Ask Your Prescriber
- What side effects should I expect, and when?
- What’s normal, and what should make me call?
- How long until I should feel a difference?
- What if I miss a dose?
- Is alcohol or caffeine okay?
- Do I need blood work?
- Who do I call after hours?
How Can We Help?
At MedCanvas Psychiatry, you shouldn’t have to guess. Our medication management and therapy care includes follow-up visits, so we can check in, adjust your plan, and answer questions. If getting to our Minot office is hard, we also offer telepsychiatry.
We treat depression, anxiety, panic disorder, PTSD, and social anxiety. You can see everything on our conditions page.
New here? A comprehensive psychiatric assessment is the best place to start.
FAQ
Are side effects a sign the medication is working?
Not really. Side effects and benefits are separate. Some people have side effects and feel better. Others have none. Don’t use side effects to measure progress.
How long do antidepressant side effects last?
Many early ones ease in one to two weeks. If they last longer or get worse, call your prescriber.
Is it normal to feel more anxious when starting an antidepressant?
It can be for some people, in the first week or two. Mild, short-lived jitters are common. If the anxiety is intense, or you feel agitated, call.
Can I drink alcohol on my medication?
Check with your prescriber. Alcohol can make drowsiness, anxiety, and low mood worse, and it may interact with some medications.
What if I miss a dose?
Follow your prescriber’s or pharmacist’s instructions for your specific medication. In general, don’t double up unless you’re told to. Not sure? Call.
Can side effects start months or years in?
Yes. They can show up after a dose change, a new medication or a change in your health. Tell your prescriber about anything new!
Take the Next Step
You don’t have to figure this out alone. If a side effect has you worried, or you’re just wondering whether something is normal, reach out.
- Contact us or book an appointment
- Call 701-963-6917
- See our services
- Meet our provider
- Keep reading on our blog
