laboratory diagnostic - drugs - Trimethoprim - serum, serum 2ml. The serum must be frozen within 4 hour after collection and must be sent in the frozen samples container(!)Centrifuge the sample and settle the serum without delay. Do not use tubes with phase separators; Specify: the reasons for the prescription (efficiency and/or toxicity test), the sampling time, the treatment start date and/or the date of any change of dosage, the dosage data (quantity administered, frequency, administration route), the subject's age, height and weight if possible, HPLC-F, ssso, todylaboratories®, bmn, code L16LD1518