Colac Suppository Type
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Class 3 β Available at drug stores and convenience stores
Drug Type
Laxative suppositories (carbon dioxide-generating)
Form
Suppositories 10 suppositories
Indication
Constipation
Active Ingredients (per 1 suppository (2.6 g))
Sodium bicarbonate 0.5 g
Anhydrous sodium dihydrogen phosphate 0.68 g
Inactive Ingredients
Anhydrous silicic acid, soya lecithin, hard fat
Instructions for Use
- βInsert 1 suppository into the anus. If no bowel movement occurs, insert 1 more.
- βFor use in the anus only β do not take orally.
- βChildren (12 years and older) should use under parental supervision.
| Age | Dose per use | Times per day |
|---|---|---|
| 12 years and older | 1 suppository (up to 2 if needed) | As needed |
| Under 12 years | Do not use | β |
- βAfter inserting, wait until the urge to defecate becomes strong β do not attempt to defecate immediately, or the suppository may be expelled before taking effect.
- βIf the suppository is too soft, refrigerate briefly before use. If too hard, leave at room temperature until soft enough to use.
- βDo not use this product if you have ever had an allergic reaction to this product or any of its ingredients.
- βDo not use other laxatives (purgatives or enemas) while using this product.
- βDo not use continuously β regular use may reduce effectiveness and lead to dependence.
- βSeek immediate medical attention if any of the following serious symptoms appear:
- β’ Shock: Chest tightness, facial pallor, cold hands and feet, cold sweats, or difficulty breathing immediately after use.
- β Consult a doctor, pharmacist, or registered salesperson before using this product if you:
- (1) Are under the care of a physician.
- (2) Have ever had an allergic reaction to a medicine or other product.
- (3) Have severe abdominal pain, nausea, or vomiting.
- βStop using immediately and consult a doctor, pharmacist, or registered salesperson β bringing this package insert with you β if any of the following symptoms appear after use, as they may be side effects:
- Gastrointestinal: Diarrhea or sense of incomplete evacuation
- βStop using and consult a doctor, pharmacist, or registered salesperson β bringing this package insert with you β if no bowel movement occurs after 2 to 3 uses.
Additional Information
Effects typically appear approximately 10 to 30 minutes after use.
The following minor symptoms may occur: anal irritation, stomach discomfort, and abdominal pain.
Sources & Documents
- Japanese product page
- Japanese PDF
- English PDF
- Last verified: May 25, 2026
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For informational purposes only. Always consult a doctor or pharmacist before taking any medication.