Esolok 20 mg Tablet is a medication manufactured by Ibn Sina Pharmaceuticals Ltd., containing Esomeprazole Magnesium Trihydrate as its active ingredient. Esomeprazole is a proton pump inhibitor (PPI) that reduces stomach acid production by inhibiting the H+/K+ ATPase enzyme in the gastric parietal cells. This action helps in treating various acid-related gastrointestinal disorders.