Osolac Oral Solution Lemon contains Lactulose 10gm per 15ml and is primarily indicated for the treatment of chronic constipation and hepatic encephalopathy. Lactulose is a synthetic disaccharide that acts as an osmotic laxative by increasing the water content and volume of stools, facilitating bowel movements. Upon oral administration, lactulose is metabolized by colonic bacteria into low molecular weight organic acids, which acidify the colon and promote peristalsis. This mechanism helps to soften stools and reduce transit time, providing effective relief from constipation. Additionally, in hepatic encephalopathy, lactulose reduces blood ammonia levels by converting ammonia to ammonium ions in the colon, thereby decreasing systemic absorption and improving neurological symptoms. Osolac Oral Solution Lemon is formulated with a palatable lemon flavor to enhance patient compliance. It is generally well tolerated; however, common adverse effects may include flatulence, abdominal discomfort, and diarrhea if overdosed. Caution is advised in patients with galactosemia or those requiring electrolyte monitoring. The dosage should be individualized based on clinical response and tolerability. Osolac Oral Solution Lemon offers a safe and effective option for managing constipation and hepatic encephalopathy under medical supervision.