Which statement about pharmacologic treatment of major depressive disorder is correct?

Which statement about pharmacologic treatment of major depressive disorder is correct?

• A. SSRIs require 3-6 weeks to determine efficacy.
• B. SSRIs produce immediate relief within hours.
• C. Tricyclic antidepressants are preferred due to safety.
• D. Monoamine oxidase inhibitors are first-line for most patients.

Answer: (A)

Antidepressants from this class take several weeks to show their full effect because the therapeutic benefit comes from gradual neuroadaptive changes rather than an immediate surge in serotonin. In clinical practice we assess response after about 4–6 weeks at a therapeutic dose, and if the improvement is insufficient, we either increase the dose or switch medications, aiming for a full response that often takes several more weeks. Immediate relief within hours is not typical, since the mood symptoms usually need time to respond. Other classes, like tricyclic antidepressants, carry higher risks of side effects and serious toxicity in overdose, which is why they’re not preferred as first-line treatments. Monoamine oxidase inhibitors require stringent dietary restrictions and have multiple drug interactions, making them less favorable as initial options for most patients.

Antidepressants from this class take several weeks to show their full effect because the therapeutic benefit comes from gradual neuroadaptive changes rather than an immediate surge in serotonin. In clinical practice we assess response after about 4–6 weeks at a therapeutic dose, and if the improvement is insufficient, we either increase the dose or switch medications, aiming for a full response that often takes several more weeks.

Immediate relief within hours is not typical, since the mood symptoms usually need time to respond. Other classes, like tricyclic antidepressants, carry higher risks of side effects and serious toxicity in overdose, which is why they’re not preferred as first-line treatments. Monoamine oxidase inhibitors require stringent dietary restrictions and have multiple drug interactions, making them less favorable as initial options for most patients.