We need details to help with POSSIBLE reasons.

1. When, and where? Ambient conditions seem to matter.

2. what type of Peth test? Dried blood spot, vinous blood draw?

3. What lab processed it? Can you get the litigation package?

4. Write down EVERYTHING you remember about the process. Was the collector trained? Brief you on how and what? EVERYTHING.

The fact is this test is prone to false positives and wild variations. No one seems to know why precisely. The fact medically ignorant people like lawyer boards, airlines, FAA, etc use it makes sense, they are buying the used car sales pitch. But medical professionals? Wow...

I’m going to private message you. Call if you want.