The desire for the fastest constipation relief is common among those experiencing uncomfortable symptoms. However, do these types of medications truly provide a permanent solution to constipation? Let's explore in the following article.
1. Comparing the fastest-acting constipation remedies
Nurturing bowel medications are a popular choice for treating constipation. Each type of medication works in a different way to address constipation symptoms. The time required to achieve positive results varies from person to person.
1.1. Stimulant Laxatives
Stimulant laxatives stand out as an excellent choice for the title of the fastest constipation relief medication. They work by stimulating the muscles in the intestines, promoting the rapid expulsion of stool. Additionally, they aid in absorbing more water to prevent dryness. This approach proves quite potent in addressing constipation.

Stimulant laxatives are a solid option for the fastest constipation relief medication
For most individuals, increased bowel movements and the urge to defecate more frequently begin within 6-12 hours after taking oral stimulant laxatives. Meanwhile, for rectal administration (using suppositories), the effects kick in within approximately 15-60 minutes.
Common stimulant laxatives nowadays often contain active ingredients like senna or bisacodyl.
1.2. Osmotic Laxatives
As the second choice in the quest for the fastest constipation relief medication, osmotic laxatives come into play. They operate by introducing more liquids into the intestinal lumen, facilitating softer stools and enhancing bowel motility.
Osmotic laxatives come in three main forms: liquid, powder to be mixed with water, and suppository. Depending on the product and individual physiology, it may take anywhere from 15 minutes to several days for these medications to normalize bowel movements.

Osmotic laxatives help draw water into the intestinal lumen
If you opt for suppositories, the effectiveness will be quicker. Oral osmotic laxatives may take longer, but they tend to have fewer side effects.
Some osmotic laxatives available in the market include Miralax, Glycolax, Citroma, Milk of Magnesia, Lactulose, Sorbitol, and more.
1.3. Stool-Softening Laxatives
Stool-softening laxatives help make stools softer and easier to pass by allowing more water to permeate the stool mass. Typically, changes will occur within the first 12 to 72 hours.
While stool-softening laxatives might not be the go-to for the title of the fastest constipation relief, they excel in preventing constipation caused by medication. Doctors often recommend patients to supplement with an osmotic laxative when prescribing a new Opioid medication. This can prevent constipation right from the start.

Therefore, it can be observed that, regardless of the type, suppositories remain the fastest constipation relief. If suppositories are not suitable, then stimulant laxatives or osmotic laxatives are suitable alternatives.
2. Details on the Fastest Constipation Relief Medications
Below are some typical examples belonging to the medication groups mentioned. You may consider using them.
2.1. Stimulant Laxative Ovalax
Ovalax is a stimulant laxative in pill form, with bisacodyl as its main component. This medication is often prescribed for patients dealing with acute constipation. The effects of the medication will manifest within 6-12 hours. Hence, it is a suitable choice for those in need of the fastest constipation relief medication.

Ovalax is effective in promoting bowel movements within 6-12 hours
Dosage: Children aged 6-10 take 1 pill/day. Individuals over 10 years old and adults take 1-2 pills/day or 3-4 pills/day if necessary.
Note: Do not administer Ovalax to children under 6 years old. Patients may experience unwanted effects such as abdominal pain, nausea, vomiting, and more when using Ovalax.
2.2. Osmotic Laxative Miralax
Miralax, with its main active ingredient being Polyethylene glycol, operates by drawing more water into the intestines. Miralax is produced in a powder form for oral solution and originates in the United States.
Typically, it takes 1 to 3 days for Miralax to demonstrate noticeable effectiveness. This might not be the ideal figure when seeking the fastest constipation relief medication. However, the duration is not excessively prolonged. Moreover, compared to other medications, it tends to have fewer side effects.

Miralax is a laxative with fewer side effects than other medications
Dosage: For children aged 5-10, take ¼ cap, diluted with about 180ml of water. For children aged 10-16, take ½ cap, diluted with about 180ml of water. Individuals aged 17 and above should take 1 cap (approximately 17g), diluted with about 240ml of water. Take once daily and preferably with warm water.
2.3. Osmotic Laxative Sorbitol
The next choice for the fastest constipation relief medications is Sorbitol. This is a well-known and widely used option. Typically, the medication will take effect within 1-2 days.
The medication is formulated in a powder form for oral solution, making it easy to use and store.

Sorbitol is suitable for use in young children with constipation
Dosage: The mixing ratio is 1 packet of medication with half a glass of water. Adults take 1 packet/day, and children take ½ packet/day. It is advisable to take it at least 10 minutes before a meal.
Note: Do not use Sorbitol for individuals with non-inflammatory bowel disease, intestinal ulcers, bowel obstruction, lactose intolerance, etc. When used, some side effects may occur, such as abdominal pain, diarrhea, bloating, etc.
2.4. Osmotic Laxative Duphalac
This is a type of medication that many doctors choose when asked about the fastest constipation relief medications. Duphalac's main component is Lactulose, a stimulant that increases motility and draws water into the intestines. Symptoms of constipation will improve after 1-2 days of using this medication.
Dosage: For infants under 1 year old, take 1 teaspoon/day. Children aged 1-6 take 1-2 teaspoons/day. Children aged 7-14 take 15ml (1 sachet)/day. Adults and children above 14 years old take 1-3 sachets/day.
Note: Duphalac is a liquid form, and patients can take it directly or dilute it with a little distilled water. During use, patients may experience some side effects such as bloating, abdominal pain, diarrhea, weight loss, etc.
2.5. Stimulant Laxative Bisacodyl
If you are looking for immediate action, rectal suppositories or enemas are the precise choice. Among most laxatives, those with rectal action are always the fastest constipation relief. You may notice the effects after approximately 15-30 minutes of using Bisacodyl suppositories.

Bisacodyl suppositories for fast action in about 30 minutes
Dosage: Adults take once daily with a 10mg suppository or 10ml rectal enema solution. For children under 10, use a 5mg suppository/day (or half of a 10mg suppository).
Note: Consult a doctor before using Bisacodyl for children under 6. Possible side effects may include abdominal pain, cramps, nausea, diarrhea, etc.
2.6. Osmotic Laxative Microlax
Microlax is a rectally administered gel often prescribed by doctors for constipated patients. The medication shows effects within 30 minutes of use. It is suitable for those in need of the fastest constipation relief.
Dosage: Use a single dose per day.
Note: Use the medication about 5-10 minutes before hygiene. Read the instructions carefully before use. During use, you may experience some side effects such as abdominal pain, diarrhea, irritation, or burning sensation in the rectum. However, these usually disappear after discontinuing the medication.
In summary, there are many options for the fastest constipation relief medications for you. Depending on your preferences, you can consider the type of medication that suits you. If you can't decide, consult the opinion of a doctor or pharmacist.
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