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Objective: To verify two hypotheses: 1) Acupuncture can increase the re-distribution of tetramethylpyrazine (ligustrazine) hydrochloride (TMPH) to the target organs in adjuvant arthritic rats. 2) Cyclic Adenosine-3, 5-monophosphate (cAMP) is one of the guidance cues involved in this event. Methods: A total of 40 Wistar rats were randomized into blank control (BC), model (MO), medication (ME), Acupuncture (Acu) and Acu+ME groups, with 8 cases in each group. Arthritis model was established by subcutaneous injection of complete Freunds adjuvant (0.1 mL) into the rats foot pad. Electroacupuncture (15 Hz, 0.2-0.3V) was applied to bilateral "Daling"(大陵PC 7), "Taichong" (太冲LR 3) and "Xiguan" (膝关LR 7) for 20 min, and the contents of TMPH in the heart, liver, kidney and the foot (affected focus) tissues and the contents of cAMP in the heart and liver tissues were determined with high performance liquid chromatography and radioimmunoassay techniques respectively. Results: Compared with medication group, the TMPH contents in the heart, liver, kidney and the affected foot tissues in Acu-ME group was obviously higher (P