laboratory diagnostic - drugs - Theophylline, Serum or EDTA Plasma or Heparin Plasma 1ml. Do not use gel separators tubes. Always sample at the same time before another administration. All requests must ALWAYS contain: sampling date and time; the date and time of the last dose; the reasons for the prescription (efficiency and/or toxicity test); the treatment start date and/or the date of any change of dosage; the subject's age, height and weight, when possible; the dosage data (quantity administered, frequency, administration route), It is IMPERATIVE to attach the completed clinical information form, supplied upon request., Imunoturbidimetrie, ssso, todylaboratories®, bmn, code L16LD1508