(Relative) contraindications to prazosin for PTSD-associated nightmares

Question from a Member: Any thoughts about the minimal pre-treatment blood pressure that one would be comfortable still prescribing prazosin (for PTSD related nightmares)? Surprisingly, the official Prescribing Information for prazosin does not list any contraindications to the use of prazosin other than sensitivity to the ingredients. Here are some suggested (relative) contraindications to starting…