Specimen Requirements
P.T.T. (Partial Thromboplastin Time)Phenobarbital
Phenobarbital
Phenytoin (Dilantin)
Phosphorus
Phosphorus, Urine
Platelet Count
Potassium
Pregnancy Screen (HCG)
Primidone (Mysoline)
Progesterone
Prolactin
Prostatic Specific Antigen (PSA)
Protein Electrophoresis
Protein, Total
Protein, Urine
Protime
PSA, Free & Total