This product is a long-acting tricyclic antihistamine that can relieve seasonal allergic rhinitis or non-nasal symptoms by selectively antagonizing peripheral H1 receptors.

1. It is a non-selective competitive inhibitor of adrenergic β-receptor blocker, blocking β1 and β2 receptors on the heart, antagonizing the effects of sympathetic nerve excitation and catecholamines, reducing the contractile force and contractile speed of the heart, while inhibiting the contraction of vascular smooth muscle, reducing myocardial oxygen consumption, and restoring the oxygen supply and demand relationship of ischemic myocardium to a low level of balance, and can be used to treat angina pectoris. 2. It inhibits the adrenergic excitement of cardiac pacemaker potentials and is used to treat arrhythmias. 3. It can be used to treat hypertension by blocking central and adrenergic neurons, inhibiting renin release and reducing cardiac output. 4. It competitively antagonizes the effects of isoproterenol and norepinephrine, blocks β2 receptors, and reduces the effects of plasma-related substances.

Lansoprazole is a proton pump inhibitor. After being distributed in the acidic environment of gastric mucosal parietal cells, it is transformed into an active metabolite. This metabolite combines with the sulfhydryl group of H, K-ATPase present in the acid-generating site, inhibiting acid secretion by inhibiting the activity of H, K-ATPase. Lansoprazole inhibits gastric acid secretion in a dose-dependent manner, and has an inhibitory effect on both basal and stimulated gastric acid secretion within 24 hours after taking the drug. It improves blood coagulation and platelet aggregation functions by increasing the pH value in the stomach, inhibits the activity of pepsin, and plays an inhibitory role in bleeding. At the same time, by inhibiting acid secretion, the pH value in the stomach rises, promoting the repair of damaged mucosa.

This product is a non-narcotic antitussive drug that mainly blocks the afferent sensory nerve impulses of the lung and pleural receptors, and also directly inhibits the antitussive center. It also has a papaverine-like smooth muscle spasmolytic effect.

It is a selective monoamine antagonist with high affinity for 5HT2 receptors, D2 receptors, α1 and α2 receptors, and H1 receptors. Its mechanism of action in the treatment of schizophrenia is believed to be the result of a combined effect of antagonism on D2 receptors and 5HT2 receptors.