A Randomized Controlled Study on the Improvement Effect of Compound Danshen Dripping Pills on Sural Nerve Action Potential Amplitude (SNAP) in Patients with Diabetic Peripheral Neuropathy

INTERVENTION: treatment group:Diazepam 0.5 mg t.i.d., plus Beraprost sodium 40 µg t.i.d.;experimental group:Mecobalamin 0.5 mg t.i.d., beraprost sodium 40 µg t.i.d., Compound Danshen Dripping Pills 10 pills t.i.d.; CONDITION: Diabetic Peripheral Neuropathy PRIMARY OUTCOME: Amplitude of sural nerve sensory nerve action potential; SECONDARY OUTCOME: Traditional Chinese Medicine syndrome score; INCLUSION CRITERIA: 1: (1) Meet the diagnostic criteria of both Western medicine and Traditional Chinese Medicine (TCM), aged between 50 and 75 years, with a diabetes mellitus duration of 3 to 12 years. 2: (2) Confirmed diagnosis of diabetic peripheral neuropathy for 3 to 8 years. 3: (3) Voluntarily participate in the study and sign the informed consent form.