Usually yes: most side effects peak in the first days to two weeks while your body adapts to new chemistry - the NHS says most antidepressant side effects ease after a couple of weeks, and the same hump is documented for metformin and blood pressure drugs.
The cruel sequencing on antidepressants: side effects before benefits (those need 4 to 6 weeks), so the first fortnight feels like all cost - the classic wrong-quit window. When worse-first does NOT apply: allergic reactions (emergency, any day), serotonin syndrome signs (agitation, sweating, twitching, racing heart - urgent), and anything severe or escalating at any point. Practical: start on quiet weeks, first doses when drowsiness is affordable, and report anything still running at two to four weeks - persistence means adjust. Pymander is a free AI doctor, 24/7 by text, and can help you judge your first weeks.
What to do
Common questions
Are medication side effects worse at first?
Usually yes, and it is physiology, not bad luck. Most side effects peak in the first days to two weeks because your body is being asked to run on new chemistry - receptors adjust, fluid and electrolyte balances shift, enzyme systems recalibrate - and then the adaptation arrives and the side effects fade. The NHS says it explicitly for sertraline and escitalopram: most side effects ease after a couple of weeks as your body gets used to the medicine - and the same first-weeks hump is documented for metformin (stomach upset), blood pressure drugs (dizziness), and statins. The useful nuance for antidepressants: the cruel sequencing - side effects before benefits, since the therapeutic effect needs 4 to 6 weeks; the first fortnight can feel like all cost, no reward, and that is the exact window when people quit wrongly. When worse-at-first is NOT the pattern: allergic reactions (swelling of lips, tongue, or throat, hives, breathing trouble - emergency, any day of the course); serotonin syndrome signs (agitation, sweating, twitching, racing heart after a new serotonergic drug or dose increase - urgent); and anything severe, escalating, or frightening at any point - severe is never a wait-it-out category. The practical rules: start new drugs on quiet weeks, not the night before a big day; take the first doses when you can afford to be drowsy or queasy; and report anything still running at the two-to-four-week mark - persistence means adjust, not endure. Pymander is a free AI doctor, 24/7 by text, that can help you judge your first weeks.