How long does it take to get rid of depression after taking medication?

Can you answer NR’s question about Depression?:

my husband in major depression from the past one month . now he is hospitalised and taking escitalopram 20 mg per day from last two weaks . even now he seems to be depressed and he tried for suicide 2 times he always thought of suicide and he does’nt want to return to work . he feel less energetic & lazy
is it possible to recover from depression after one month & to go to job agin . i am really worried about his suicidal ideation. please help me . but his doctor gave him assurance to get rid of of him from the depression.

Postpartum Depression Symptoms