Understanding Microlax and Its Purpose
Microlax is a brand of micro-enema used for the relief of constipation [1.2.3]. It is a fast-acting laxative that works locally in the rectum to soften stool and facilitate a bowel movement, typically within 5 to 15 minutes [1.2.4, 1.3.7]. Unlike some other laxatives, it doesn't significantly affect overall intestinal activity [1.2.3]. It is often used for individuals who are bedridden or have limited mobility, as well as for bowel cleansing before medical procedures like an X-ray or rectoscopy [1.5.7]. Chronic constipation is a prevalent issue, affecting an estimated 16% of adults globally and up to 33.5% of adults over 60 [1.6.5].
The Mechanism of Action: How Microlax Works
Microlax's effectiveness comes from its unique combination of active ingredients: sodium citrate, sodium lauryl sulfoacetate, and sorbitol [1.4.3]. Together, these substances work as osmotic laxatives and fecal softeners [1.4.1, 1.4.8].
- Sodium Citrate: This is a peptidizing agent that liberates the water bound within hard, dry stool [1.4.1, 1.4.8].
- Sodium Lauryl Sulfoacetate: This agent improves the solution's ability to wet and penetrate the stool's surface [1.4.1, 1.4.2].
- Sorbitol: This enhances the water-releasing effect of sodium citrate [1.4.1].
By releasing this trapped water, the enema softens the stool, increasing its volume and stimulating the rectum, which leads to a bowel movement [1.4.1, 1.4.2]. The ingredients are not absorbed by the body and are excreted with the stool [1.4.1].
Proper Administration and Holding Time
For Microlax to be effective, it's crucial to use it correctly. The recommended holding time is a key part of this process.
Step-by-Step Instructions for Use:
- Preparation: It can be helpful to warm the unopened tube in warm water for about five minutes to bring it to body temperature [1.2.2]. Lie on your side with your knees drawn toward your chest (the fetal position) or sit on the toilet [1.2.3, 1.3.4].
- Open and Lubricate: Twist and pull the seal off the nozzle [1.3.2]. You can squeeze a single drop of the solution onto the tip to lubricate it for easier insertion [1.3.2, 1.3.4].
- Insertion: Gently insert the full length of the nozzle into the rectum. For children under 3 years of age, only half the nozzle length should be inserted [1.3.1].
- Administer: Squeeze the tube firmly to empty all of its contents [1.3.2].
- Withdrawal: It is important to keep the tube squeezed tightly while withdrawing the nozzle to prevent the medicine from being drawn back into the tube [1.2.3, 1.3.4].
How Long to Hold It In
After administration, you should try to hold the liquid inside for about 5 to 10 minutes [1.2.2]. Some sources state that a bowel movement is typically felt within 5 to 15 minutes [1.2.3, 1.3.7]. It is important to try and wait at least 5 minutes to allow the solution to soften the stool effectively [1.2.6]. If you feel the urge to go before this time, try to hold it if possible, but do not worry if you cannot [1.2.1, 1.2.2]. After about 15 minutes, you can try to empty your bowels, but avoid straining [1.2.1].
Comparing Laxative Types
Microlax is just one of many options for treating constipation. Different types of laxatives work in different ways and have varying onset times.
| Laxative Type | How it Works | Examples | Typical Onset Time |
|---|---|---|---|
| Micro-Enema (Osmotic) | Draws water into the stool locally in the rectum to soften it. [1.4.1, 1.4.2] | Microlax [1.2.3] | 5–15 minutes [1.2.3] |
| Stimulant Laxatives | Trigger intestinal muscle contractions to move stool along. [1.7.5] | Bisacodyl (Dulcolax), Senna (Senokot) [1.7.2, 1.7.5] | 6–12 hours (oral), 15-60 mins (suppository) [1.7.2, 1.7.6] |
| Oral Osmotics | Draw water from the body into the colon to soften stool. [1.7.5] | Polyethylene glycol (MiraLAX), Magnesium hydroxide [1.7.3] | 1–3 days (PEG), hours for others [1.7.4, 1.7.5] |
| Bulk-Forming (Fiber) | Absorb water to form soft, bulky stool, stimulating the intestine. [1.7.5] | Psyllium (Metamucil), Methylcellulose (Citrucel) [1.7.3] | 2–3 days [1.7.4] |
| Stool Softeners | Add moisture and fat to the stool to soften it. [1.7.3] | Docusate (Colace) [1.7.3] | 12–72 hours [1.7.2] |
Potential Side Effects and Precautions
While generally safe, Microlax can cause some side effects, although they are not common. A slight rectal burning sensation has been reported occasionally [1.5.2, 1.5.7]. Excessive use may lead to diarrhea and fluid loss [1.3.7, 1.5.3]. It's important not to use Microlax if you are allergic to any of its ingredients or have inflammatory bowel disease [1.3.7, 1.5.5]. If constipation is accompanied by severe stomach pain, blood in the stools, fever, or weight loss, you should consult a doctor as these could be signs of a more serious condition [1.3.5]. Prolonged use of any laxative is generally not recommended as it may lead to dependence [1.4.3].
Conclusion
For effective use of a Microlax enema, it is recommended to hold the solution in for 5 to 15 minutes to allow it to soften the stool before attempting a bowel movement [1.2.3, 1.3.7]. This fast-acting, local treatment offers a predictable solution for occasional constipation. Always follow the administration instructions carefully and consult a healthcare professional if your symptoms persist or if you have any underlying health conditions. For more information, you can visit the official MICROLAX® website.
