First-Line Medications for Depression: What Every PMHNP Should Know

by | Apr 7, 2026 | Prescribing tips for treating mental disorders

Depression is one of the most common chief complaints patients present to us with. As a PMHNP, I remember the early days of practice—feeling overwhelmed by how much there was to consider when treating depression. There’s no one-size-fits-all treatment, and with so many contributing factors, knowing where to start can feel like a challenge.

That’s why it’s essential to understand the fundamentals of prescribing. Whether you’re just beginning or have years of experience under your belt, revisiting these key tips for choosing first-line medications for depression can make all the difference.

🧠 Practical Tips for Selecting First-Line Medications for Depression

Assess the Symptom Profile

Not all depression is the same. From unipolar to bipolar to persistent depressive disorder, identifying the type of depression is the foundation of treatment selection.

Consider Side Effects

Side effects like weight gain, sedation, or sexual dysfunction can impact medication adherence. Be proactive—discuss these openly with patients so they know what to expect and feel supported in the process.

Evaluate Comorbid Conditions

Always look at the full clinical picture. A history of seizures? Some meds are off the table. Chronic pain or insomnia? Certain antidepressants may help with those too. Choosing wisely means considering the whole person, not just the primary diagnosis.

Trial and Patience

Antidepressants don’t work overnight. They take time—and so does the process of finding the right one. Let your patient know upfront that it might be a few weeks before they notice real change. Managing expectations fosters trust and patience.

🚫 Common Pitfalls to Avoid When Initiating Treatment

➡️ Starting Too High

Going in with a high dose might seem efficient, but it often backfires due to side effects. Start low and titrate slowly to minimize side effects and improve long-term adherence.

➡️ Ignoring Patient Concerns

If your patient is hesitant about medication, acknowledge it. Listen. Educate. Reassure. And readjust as needed. This helps build the therapeutic alliance and supports ongoing engagement in treatment.

➡️ Under-Estimating the Power of Follow-Up

One of the biggest mistakes I made early on? Waiting too long to make medication adjustments. Schedule early follow-ups to assess response, tweak dosages, and address side effects promptly.

Mistakes Are the Best Teachers

I’ve had my fair share of prescribing missteps—like being overly cautious and waiting six weeks to increase a starting dose of sertraline. Or pulling a patient off meds too quickly because of initial side effects. But every experience helped me become a better provider.

We’re all learning. And the more we share our real-world challenges, the stronger we grow as a community.

🎓 Dive Deeper with a Free Case Study Training

If you’re a visual learner or love applying concepts through examples, I created a free training that walks through a case study on depression (and another on psychosis!). These case studies bring these principles to life and gives you a practical look at how to implement this in your own practice.

👉 Reserve Your Spot Now

Let’s keep learning together—because every skill you sharpen helps another patient get the care they deserve.

P.S. There’s always more to explore. The Mental Disorders Crash Course was built to give psych NPs tools and strategies for real-world practice. If you’re ready to simplify and strengthen how you treat mental disorders, check it out.

Further Reading