And if you ask me, the situation for SAD is still better than the one for ptsd, this terrible disorder only has 2 approved drugs, paxil and sertraline, with sertraline being deemed as not effective enough but the FDA had no choice but to approved it because at the time no other drug was approved.
And most of the time the response to drugs for ptsd is unsatisfactory.
By the ncbi site:
The only FDA-approved drugs for the treatment of PTSD are the selective serotonin reuptake inhibitors (SSRIs) sertraline (Zoloft, Pfizer) and paroxetine HCl (Paxil, GlaxoSmithKline).2–4 All other agents are used off-label, including paroxetine mesylate (Pexeva, Noven), which is chemically similar to paroxetine but is not FDA-approved for PTSD.5 SSRIs affect the neurotransmitter serotonin primarily, which is important in regulating mood, anxiety, appetite, sleep, and other bodily functions.2
Although SSRIs are associated with an overall response rate of approximately 60% in patients with PTSD, only 20% to 30% of patients achieve complete remission.6 In two clinical studies of PTSD, sertraline was significantly more effective than placebo, according to several efficacy measures, including the Clinician-Administered PTSD Scale, Part 2 (CAPS-2). In two additional studies, however, the difference in response to treatment between patients receiving sertraline and patients receiving placebo was not statistically significant.3
Moreover, few published trials have demonstrated the superiority of paroxetine over placebo in managing the three symptom clusters of PTSD.7,8 A comparison of paroxetine with placebo in patients with PTSD demonstrated that sertraline was significantly superior to placebo for the change from baseline in the CAPS-2 total score but not for the proportion of responders on the Clinical Global Impression–Improvement (CGI–I) scale.4
The SSRI fluoxetine (Prozac, Eli Lilly) was evaluated in a placebo-controlled study of combat veterans with severe, chronic PTSD.9 Veterans treated with fluoxetine failed to show a greater clinical response compared with placebo-treated veterans, even though fluoxetine was effective in patients with less severe PTSD in previous studies. Fluoxetine has been on the market since 1987 and is indicated for the treatment of major depressive disorder, obsessive compulsive disorder, bulimia nervosa, and panic disorder.10