Shared decision-making is the framework that integrates clinician expertise about clinical options with patient expertise about their own values. The decision is reached together. Done well, SDM produces better adherence, better outcomes, and more durable treatment plans than either paternalistic prescribing or pure patient-choice abdication.
Two streams of expertise. You know the options, the trade-offs, the evidence, the typical responses. The patient knows their own values, priorities, lived constraints, prior experiences, and what they can sustain. Neither stream alone produces the best decision; together they do.
Present trade-offs honestly. Most psychiatric medication decisions involve genuine trade-offs — sertraline (broad indications, well-tolerated, but sexual dysfunction) versus bupropion (no sexual dysfunction, no weight gain, but activation and seizure threshold concerns) versus mirtazapine (sleep and appetite benefit, but weight gain and sedation). Lay out the options with their specific profiles; don't sell one.
Elicit values. "Some patients particularly want to avoid weight gain. Others want to avoid sexual side effects. Others care most about cost or about avoiding sedation. What matters most to you?" The patient's priorities are often different from what you'd anticipate; ask explicitly.
Then make a recommendation. SDM doesn't mean abdication. After eliciting values, you offer your clinical judgment: "Given what you said about wanting to avoid weight gain and preferring something activating, I'd recommend bupropion. But it's your decision — what do you think?" The recommendation is informed by their values; the decision belongs to them.
Document the conversation. "Discussed options including sertraline, bupropion, escitalopram. Patient prioritized avoiding sexual side effects and prior sedation experience. Chose bupropion together." The note shows the SDM process; future readers know how the decision was reached.
SDM works for almost all psychiatric prescribing when the patient has capacity. Even in acute settings, eliciting "what matters to you" produces better decisions than ignoring it.