Prosecutors can’t find the only surviving blood sample that was drawn from pharmaceutical millionaire Gigi Jordan in the hours after she allegedly gave a fatal drug overdose to her son, Jude, 8, at the Peninsula Hotel last year — and that has defense lawyers threatening to seek the dismissal of the case.

The 1 milliliter sample of Jordan’s blood — about one-fifth of a teaspoon — might have proven that she had also stuffed herself full of hydrocodone and benzodiazepines, thus bolstering the defense’s assertion that Jordan intended for both she and her son to die that day, her lawyer, Ron Kuby, said yesterday.

Jordan, 50, plans to go to trial with the bizarre defense that when she crammed both herself and her son with fatal quantities of drugs, she believed it was their only escape from her son’s hell of sexual abuse and death threats at the hands of both his biological and adoptive fathers.

In a letter filed with the court late last week, prosecutors blamed Jordan’s missing blood sample on Bellevue Hospital, where it had been drawn and stored.

Kuby blasted the unexplained blood loss as “just a symptom of the anemic state of the prosecution’s case.”

laura.italiano@nypost.com

