I have been on different antidepressants for 16 yrs. I personally am not able to function without them. I can't deal with people, my anger gets out of control, I want to be violent, I am not able to run my life when I am not on antidepressants.
Getting on to one does not cause pain.
Getting off them has to be done by tapering, and there is sharp pain shocks, stomach upset, lack of sleep, anxiety, an real bad depression. My brain hates being on it's own.
Now, if you think you can't manage your life and PTSD or depression without help, seek help in the form of therapy, and maybe meds. This is a good place for you to get opinions from thousands of people who know.
Talk to the therapist about your options. Read about the ones he or she thinks would work for you. If you do try one, give it two weeks or so before you decide if it's helping you, unless of course the med makes you sick or makes you have wild thoughts or you have the shakes or some obvious side effect. Paxil, for example, made me so warped that I could only think about the ceiling fan. I could not concentrate on any other idea. And I could not sleep and I shook. I was on it just 4 days.
On the other hand, I have now been on Effexor XR for 3 weeks and I am happy, calm, able to talk myself down from confrontations, energetic, motivated, and all is right with my world.
That being said, if the first choice of meds does not make you feel steady and "normal" toward the people around you, try a different drug. There are many classes of drugs, and in those classes are drugs with slightly different ingredients that make them unique.
Don't give up. We are a resource if you want to talk, get opinions, information, or feel like you are among understanding friends.