Antiepileptic drugs and antiarrhythmic drugs increase the outflow of sodium ions from cells, reduce the inflow of sodium ions, stabilize the nerve cell membrane, increase the excitation threshold, and reduce the spread of high-frequency discharges of lesions; shorten the action potential interval and effective refractory period, inhibit the influx of calcium ions, reduce myocardial automaticity, inhibit the sympathetic center, have an inhibitory effect on ectopic rhythm points, and increase the threshold of atrial fibrillation and ventricular fibrillation; have anti-neuralgia and skeletal muscle relaxation effects; inhibit the synthesis (or) secretion of collagenase by skin fibroblasts, accelerate vitamin D metabolism, can cause lymphadenopathy, have anti-folate effects, have an inhibitory effect on the hematopoietic system, can cause allergic reactions, have enzyme induction effects, and intravenous administration can dilate peripheral blood vessels.

As a histamine H1 receptor antagonist, this product can counteract capillary dilation caused by allergic reactions, reduce capillary permeability, and relieve wheezing caused by bronchial smooth muscle contraction; this product has a long-lasting antihistamine effect and also has a significant central inhibitory effect, which can increase the effects of anesthetics, analgesics, hypnotics and local anesthetics; this product is mainly metabolized in the liver.

This product is a vitamin drug. Like vitamin B1, active thiamine combines with pyrophosphate in the body to form a cocarboxylase, which participates in the oxidative decarboxylation reaction of pyruvate and alpha-ketoglutaric acid in sugar metabolism and is necessary for sugar metabolism. When it is deficient, oxidation is blocked to form pyruvate, lactic acid accumulates, and affects the body's energy supply. Its symptoms are mainly manifested in the nervous and cardiovascular systems, and multiple peripheral neuritis affecting both sensory nerves and motor nerves occurs, manifested as paresthesia, neuralgia, limb weakness, and muscle soreness and atrophy. In terms of cardiovascular, due to the increase of acetone and lactic acid in the blood, the small arteries are dilated, the diastolic pressure decreases, and the myocardial metabolism is disturbed, so it is easy to have symptoms of heart failure such as palpitations, shortness of breath, chest tightness, cardiac hypertrophy, liver and lung congestion and peripheral edema. In terms of the digestive tract, it is manifested as decreased appetite.

This product is an anticholinergic drug that can significantly relieve gastrointestinal smooth muscle spasm.

This product is a non-recessive antitussive drug, and its antitussive effect is only 1/3 of that of codeine. It has central and peripheral antitussive effects. In addition to directly inhibiting the respiratory center of the medulla oblongata, it also has a weak atropine effect. After absorption, it can slightly inhibit the receptors in the bronchus, weaken the cough reflex, and relax the spasmodic bronchial smooth muscles, reducing airway resistance.