Symptoms of Congenital Sucrase-Isomaltase Deficiency (CSID) for HCPs



What Are the Symptoms of Congenital Sucrase-Isomaltase Deficiency?

The clinical presentation of Congenital Sucrase-Isomaltase Deficiency (CSID) can vary from mild to severe chronic, watery diarrhea and/or abdominal pain.

Often, symptoms do not manifest in infants until they begin to ingest sucrose and starch-containing foods (for example, juices, solid foods, and medications sweetened with sucrose).

Chronic, watery diarrhea and failure to thrive are the most common symptoms in infants and toddlers. Other manifestations include abdominal distention, gassiness, colic, irritability, excoriated buttocks, diaper rash, and vomiting.

In some populations, notably the Greenland Eskimos and some Alaskan natives, a low-carbohydrate, high-protein, high-fat diet may delay the development of CSID symptoms.2 A small number of patients may require hospitalization for diarrhea and dehydration, malnutrition, muscle wasting and weakness.1-3 Patients with confirmed CSID commonly report being examined in the past for toddler’s diarrhea, irritable bowel syndrome-diarrhea (IBS-D), lactose intolerance, celiac disease, cystic fibrosis, or food allergies.1,4

The gastrointestinal (GI) symptoms associated with CSID tend to persist in adults, because CSID is not a disease that a patient can outgrow. Symptoms may appear less severe in adults compared to those experienced by children. In some adults, symptoms may be limited to an increase in bowel frequency, abdominal distention, and flatulence although episodic watery diarrhea upon ingestion of high levels of sucrose may occur.1 In certain patients, diarrhea may alternate with constipation, leading to a misdiagnosis of CSID as irritable bowel syndrome-alternating (IBS-A).

As with pediatric patients, the clinical presentation in adults varies dramatically from patient to patient. Some patients with CSID may experience several severe symptoms in response to consumption of sucrose, while others may experience only mild discomfort.

Figure 1. Distribution of presenting symptoms of CSID in twenty-three pediatric patients1

Symptoms Consistent with a Diagnosis of CSID

Table 1. Overview of CSID Symptoms

Common Signs and Symptoms

Individuals with Congenital Sucrase-Isomaltase Deficiency (CSID) typically have one or more of the following symptoms:

  1. Chronic diarrhea and/or loose stools (more severe or explosive in young children or babies after they have stopped breastfeeding)
  2. Acidic stools (stool pH <6) resulting in excoriated buttocks or rash
  3. High frequency of bowel movements (BMs)
  4. Reports of particularly foul BM odor related to poor absorption of carbohydrates
  5. Gas and abdominal bloating
  6. Abdominal pain
  7. Complaints of nausea or indigestion
  8. Diarrhea mixed with intermittent constipation, particularly when chronically taking common drugs to stop diarrhea
  9. Onset of symptoms soon after consuming a meal
  10. A low body mass index (BMI) that falls below the age-appropriate growth chart curve or failure to thrive when very young
  11. Avoidance or intolerance of foods containing carbohydrates, particularly sugary sweets or starches (for example, potatoes, rice, pasta)
  12. Lack of relief from treatment with common drugs to stop diarrhea
  13. Long history of examinations by multiple gastroenterologists for unusual GI conditions with symptoms similar to CSID, such as inflammation of the gall bladder (cholecystitis); intolerance of foods containing gluten (proteins found in grains), called celiac disease; an inherited disorder that impairs the secretion of mucus, called cystic fibrosis; and impaired absorption of bile acid (naturally-occurring molecule that helps the body break down fats); all these conditions also may cause chronic diarrhea

Family History of GI Symptoms

Since CSID is an inherited disorder, other family members may also be affected:

  1. Parents and/or siblings may have similar GI symptoms after a meal
  2. They may avoid eating carbohydrates and sweet foods

Symptom Frequency and Duration

  1. Individuals with CSID may experience GI symptoms frequently (several times a week or every day)
  2. Onset of symptoms is shortly after eating a meal
  3. Symptoms have been a problem for a very long-time (since childhood or for many years); in children, symptoms may start when no longer breastfeeding, with increased consumption of dietary carbohydrates in baby foods

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Important Safety Information for Sucraid® (sacrosidase) Oral Solution

  • Sucraid® may cause a serious allergic reaction. Patients should stop taking Sucraid® and get emergency help immediately if any of the following side effects occur: difficulty breathing, wheezing, or swelling of the face. Care should be taken when administering initial doses of Sucraid® to observe any signs of acute hypersensitivity reaction.
  • Do not use Sucraid® (sacrosidase) Oral Solution with patients known to be hypersensitive to yeast, yeast products, papain, or glycerin (glycerol).
  • Although Sucraid® provides replacement therapy for the deficient sucrase, it does not provide specific replacement therapy for the deficient isomaltase.
  • Adverse reactions as a result of taking Sucraid® may include worse abdominal pain, vomiting, nausea, diarrhea, constipation, difficulty sleeping, headache, nervousness, and dehydration.
  • Before prescribing Sucraid® to diabetic patients, the physician should consider that Sucraid® will enable sucrose hydrolysis and the absorption of those hydrolysis products, glucose and fructose.
  • The effects of Sucraid® have not been evaluated in patients with secondary (acquired) disaccharidase deficiency.
  • DO NOT HEAT SOLUTIONS CONTAINING SUCRAID®. Do not put Sucraid® in warm or hot fluids. Do not reconstitute or consume Sucraid® with fruit juice since the acidity of the juice may reduce the enzyme activity of Sucraid®. Half of the reconstituted Sucraid® should be taken at the beginning of the meal or snack and the other half during the meal or snack.
  • Sucraid® should be refrigerated at 36°F-46°F (2°C-8°C) and should be protected from heat and light.


Sucraid®(sacrosidase) Oral Solution is an enzyme replacement therapy for the treatment of genetically determined sucrase deficiency, which is part of Congenital Sucrase-Isomaltase Deficiency (CSID).