Constulose Prices — US Pharmacy Cost vs Canada — Save Up to 93% in the US

At the US pharmacies in our data, the lowest listed discount-card price for Lactulose is around $8.59. Prices vary by pharmacy, dosage, and pack size, so use the table above to compare specific options near you.

Yes — Cost Plus Drugs lists Lactulose at roughly $0.011 per unit, a published price with no membership card or coupon involved. See the three-price comparison above for how that stacks up against discount-card pharmacies.

Canadian pharmacy listings in our data show Lactulose priced from about $0.150 per tablet (converted to USD), before shipping. Pack size and pharmacy both affect the final total — see the Canada pricing table for specifics.

Drug pricing is set separately in each country through different negotiation, regulatory, and distribution systems, so the same medication can legitimately carry different price tags on either side of the border. In this case, our data shows the US price is actually the lower of the two once a program like Cost Plus Drugs is factored in — the assumption that Canada is always cheaper doesn't hold for every drug.

Constulose itself is a brand-name version of the drug lactulose, which is also available as a generic. Lactulose is the active ingredient. Other branded versions of lactulose exist for different indications; for example, Enulose (from Teva) is used to treat hepatic encephalopathy, and Kristalose (from Cumberland Pharmaceuticals) is an oral powder. For treating chronic constipation, generic lactulose is widely available and commonly prescribed.

Constulose is a prescription medication containing lactulose, a synthetic sugar, and is indicated for the treatment of chronic constipation after other measures have failed. It acts as an osmotic laxative, drawing water into the colon to increase stool bulk, soften the stool, and stimulate bowel movements. This can lead to more frequent bowel movements and more regular patterns. The typical dosage is one to two tablespoons (15-30 mL) of the oral solution taken once daily. Always consult your doctor or pharmacist for specific dosing instructions.

Constulose is generally well-tolerated, with common side effects primarily related to the digestive system. These may include gas, bloating, stomach discomfort, nausea, vomiting, and diarrhea. Serious allergic reactions are uncommon but can involve symptoms like hives, itching, skin rash, or swelling. Because lactulose is chemically similar to lactose, individuals with lactose intolerance or milk allergies may be more susceptible to side effects. Additionally, Constulose contains small amounts of galactose, so it is not suitable for people who must follow a galactose-free diet. Consult your healthcare provider for a complete list of potential side effects and to discuss any concerns.