Medication Management

How to Tell Whether Your Psychiatric Medication Is Working

By Dr. Stacey Forbes, DNP, APRN, PMHNP-BC · Updated October 12, 2026

The most reliable way to tell whether a psychiatric medication is working is to measure, not just recall. If you use the same short questionnaire every couple of weeks, keep a simple side-effect and sleep log, and track one or two everyday goals, you’ll turn a vague “I think I’m a bit better?” into a trend you and your prescriber can see. This guide covers how to do that. It doesn’t cover warning signs or typical timelines; those have their own guides, linked below.

Why measure instead of guess

When a prescriber asks “How have you been?”, most of us answer from how we feel today. A bad morning can erase two good weeks, and a good day can hide a slow decline. Improvement on medication is often gradual, so it’s easy to miss from inside.

Clinicians call the alternative measurement-based care: using the same validated questionnaire at regular intervals and making treatment decisions from the trend. The AIMS Center at the University of Washington, which helped develop collaborative care for depression, recommends re-measuring symptoms at every contact and changing the plan when scores aren’t improving enough. You don’t need a clinic to do this. Most of the tools are free and take a few minutes.

This page is about how to measure. For what to watch for, see 7 signs your psychiatric medication isn’t working. For how long different medications usually take, see how long psychiatric medication takes to work.

The PHQ-9 for depression symptoms

The Patient Health Questionnaire-9 asks how often nine symptoms of depression have bothered you over the last two weeks. You score each one from 0 (“not at all”) to 3 (“nearly every day”), for a total from 0 to 27. In the original validation study, scores of 5, 10, 15, and 20 marked the starting points of mild, moderate, moderately severe, and severe depression.

The PHQ-9 and GAD-7 are published by Pfizer on the PHQ Screeners site. Pfizer exempts them from its usual copyright restrictions, so they’re free to download and use. Because each one asks about two weeks, taking it every two weeks makes sense. Taking it more often mostly re-measures the same days.

The GAD-7 for anxiety symptoms

The Generalized Anxiety Disorder-7 works the same way. It has seven items, each scored 0–3, over the last two weeks, for a total from 0 to 21. Commonly used cut-offs are 5, 10, and 15 for mild, moderate, and severe anxiety.

It is a useful tracker even if your diagnosis isn’t generalized anxiety disorder, because it captures worry, restlessness, and irritability that come with many conditions. For other diagnoses, such as ADHD, bipolar disorder, or PTSD, there are condition-specific rating scales. Ask your prescriber which one, if any, fits you.

A word of caution: these are self-report tools. They can’t diagnose you on their own, and a single score is a snapshot. The trend over several weeks is what matters.

Response, remission, and partial response

Clinicians use specific words for how much a score has improved:

• Response usually means a reduction of at least half from your starting score. The AIMS Center’s collaborative-care guidance sets a target of at least a 50% reduction, and says the plan should change if that isn’t reached. In collaborative care, that change typically comes every 10–12 weeks.
• Remission means symptoms are minimal. For depression, the federal quality measure “Depression Remission at Twelve Months” (CMS159) defines it as a PHQ-9 score of less than 5.
• Partial response is the frustrating middle: clearly better, but short of half.

These definitions come from research and quality measurement. They aren’t a grade on you. A partial response is useful information, not a failure. It may lead to a dose adjustment, a switch, an added treatment, or more time. Those decisions belong in a conversation with your prescriber. See add a second medication or switch? for how that choice is made.

Tracking side effects without catastrophizing

Benefit is only half the picture. A simple side-effect log helps you and your prescriber tell what’s temporary from what’s persistent, and what’s caused by the medication from what’s just coincidence:

• Use the same 0–3 scale as the questionnaires: none, mild, moderate, severe.
• Note the timing relative to your dose and to any dose change. Patterns are the useful part.
• Include things people often leave out: sexual side effects, weight or appetite change, emotional flatness, and restlessness.
• Write it down and keep taking the medication as prescribed unless your prescriber tells you otherwise. Our guide to common side effects and how to reduce them covers what can be done.

Functional goals and a two-minute daily log

Scores measure symptoms. Your life is measured in what you can do. Pick two or three concrete, personal goals at the start, such as “back to the gym twice a week,” “answering work email the same day,” or “not cancelling on friends,” and check them each week. Improvement in function sometimes shows up before scores move, or the other way around.

A brief daily log fills in the gaps between questionnaires. Keep it short enough that you’ll actually do it:

• Mood today, 0–10.
• Anxiety today, 0–10.
• Sleep: roughly what time you went to bed, what time you woke, and how rested you felt.
• One line of context: a missed dose, alcohol, a hard day at work, illness, a menstrual cycle, a change in routine.

Sleep deserves its own line, because it both responds to medication and affects how every other symptom feels. If it helps, a notes app or paper calendar works as well as any special app. If tracking starts making you more anxious, scale back to weekly. The goal is information, not vigilance.

Bringing your data to a visit

A stack of daily entries is hard to use in a short follow-up. Turn it into one page:

1. Your questionnaire scores in date order, with the starting score at the top.
2. The dates of every medication start, stop, or dose change, written beside the scores.
3. Side effects that have lasted more than two weeks, with their 0–3 ratings.
4. Progress on your two or three functional goals.
5. One or two questions you most want answered.

Your prescriber may use their own measures or questionnaires; your notes add to them, they don’t replace them. At Willow & Stone, follow-up visits are longer and unhurried, so there is time to go through what you’ve tracked together. Read more about what happens at follow-up appointments, the practice’s approach to medication management, or book through the consultation page.

Common Questions

Sources & Further Reading

• Kroenke K, Spitzer RL, Williams JB. The PHQ-9: validity of a brief depression severity measure. J Gen Intern Med 2001 (PMC)
• Sapra A et al. Using GAD-2 and GAD-7 in a primary care setting. Cureus 2020 (PMC)
• PHQ Screeners (Pfizer) — Terms of use for the PHQ and GAD-7
• eCQI Resource Center (CMS) — CMS159v14, Depression Remission at Twelve Months
• AIMS Center, University of Washington — Measurement-Based Treatment to Target

This article is general education, not advice for your situation. Do not start, stop, or change a medication or supplement without talking to the clinician who prescribes it.