Mental Health Medications: A Plain-Language Guide
A stigma-free overview of antidepressants, anti-anxiety medications, and mood stabilizers — how they work, what to expect starting out, and how your pharmacist can help.
Starting a New Mental Health Medication
It's common to feel unsure about starting a new mental health medication, and completely normal to have questions your appointment didn't cover. Our pharmacists are one of the most accessible resources for those questions — no appointment needed.
Common Classes, in Plain Language
Sertraline, escitalopram, fluoxetine. The most commonly prescribed antidepressants. Can take 4–6 weeks for full effect.
Venlafaxine, duloxetine. Similar to SSRIs, also used for certain chronic pain conditions.
Includes both SSRIs (long-term) and benzodiazepines (short-term, used cautiously due to dependence risk).
Lithium, lamotrigine, and others used for bipolar disorder — require regular blood monitoring for some.
Used for a range of conditions beyond psychosis, including mood stabilization and some anxiety disorders, at varying doses.
What to Expect in the First Few Weeks
Many antidepressants take four to six weeks to reach full effect, while side effects — mild nausea, headache, sleep changes — often show up in the first week or two and settle down after that. This mismatch is one of the main reasons people stop too early, before the medication has had a chance to work.
If side effects are difficult, call us or your prescriber rather than stopping on your own — some medications need to be tapered rather than stopped abruptly.
Never Stop Abruptly
Suddenly stopping many mental health medications — especially SSRIs, SNRIs, and benzodiazepines — can cause withdrawal symptoms or a return of the original condition, sometimes worse than before. Always talk to your prescriber or pharmacist about a tapering plan before stopping.
Coverage in Ontario
Most mental health medications are covered under private insurance and the Ontario Drug Benefit (ODB) for eligible residents. If cost is a barrier, tell us — there are often equally effective, more affordable alternatives, and we can help you navigate coverage.
A Judgment-Free Conversation
Questions about mental health medications are some of the most common we field, and there's no such thing as a question too small. Whether it's about side effects, interactions with other medications, or just wanting a second explanation of how something works — we're here for that conversation, privately, at the counter or in our consultation room.
Have a question about your medications?
Our pharmacists are available to talk through anything in this article, in person or over the phone — no appointment necessary.
Nepean, ON K2J 2W7613-823-8030Mon–Fri 9 AM–5 PM
Sat–Sun Closed
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Read Guide →Medical Disclaimer: The information in this article is intended for general informational purposes only and does not constitute medical advice. Always consult your pharmacist or physician before making any changes to your medications, treatments, or health routine.