Interviews can be hell for us stutterers. Personally, I take Propanolol and Baclofen 90 minutes beforehand. It really takes away the adrenaline and relaxes me a lot more. I’m also on anti anxiety meds too, which helps me heaps. Remember to do breathing exercises daily, especially the morning of the interview to calm your vagus nerve. Start getting quality sleep too. Poor sleep quality will exacerbate your stuttering. Caffeine wrecks my speech, but others find it soothing.