Radiation sickness symptoms: Dizziness, lightheadedness, nausea.
Panic attack symptoms: Dizziness, lightheadedness, nausea.
True, you won’t see the real effects until the teeth and hair start shedding. Puking and so on can be from stress.
Well, the blood tests will start showing things early.
I didn’t say it was real, just looking for info. However acute radiation sickness is a little more impressive than panic symptoms. Barfing up chunks of dead intestine is not a panic symptom. Neither is pooping out chunks of bloody intestine. A reasonably competent medical person can tell the diffence.