It's all so individual, so what might help you could be very different from what might help others here. But personally, most meds have NOT worked well for me. I tried every major SSRI, SNRI, and NRI. What happened, especially with the SSRI/SNRI was increased dissociation and self-destructive behaviors. I lost some anxiety, but flipped over into major numbness and not giving a shit about anything, so just let myself starve or drink, or quit jobs or run away. I was really checked out on those meds.
My current doctor has been great about not pushing meds. She knows I've tried these in the past. And through a period of frequent panic attacks we agreed that benzos also aren't a good option for me because of my addiction history. So, that doesn't leave many options. I'm on gabapentin for pain and that seems to relax me a bit. Also, I am now taking a tiny dose of amitriptyline for sleep/pain and that seems fine. Mostly I'm working on all the self-regulation stuff through a body/somatic therapy approach to trauma. So when I'm flooded with adrenaline and on verge of panic, I've learned what actions help me settle. Same with freeze and body memory stuff. I am sort of grateful meds don't work well for me, because I've had to learn other ways through this stuff, and this is what creates actual change over time...I'm rewiring my nervous system and gradually changing my response to triggers.
There isn't really a PTSD pill. But with anything, it's good to start on a tiny dose and keep track of how it is relating to your symptoms. Are you getting more anxious? More numb? More relaxed? Etc. Hopefully you and your doctor can decide what might be most helpful in relation to your symptoms. Then, with any med, the goal for me is that it helps me do the things that help me more naturally feel okay and regulated (like a little gabapentin for pain pulls me out of pain-depression and helps me enjoy exercise, walking, meditating little...good things...).