Miralax vs Dulcolax vs Colace: Comparison Chart & Generic Guide
Table of Contents
The primary difference between Miralax vs Dulcolax vs Colace isn't just brand preference—it's the mechanism of action. Choose Miralax (Osmotic) for gentle consistency, Dulcolax (Stimulant) for immediate relief, or Colace (Softener) for comfort without strain.
This guide helps you compare the clinical specs and shop our In-Stock Generic Alternatives so you can access the exact relief you need without the pharmacy markup.
⚠️ Inventory Update: All 3 Types In Stock
Updated January 2026: Verified bulk stock for Miralax, Dulcolax, and Colace generics.
Why pay for the brand name? We have the FDA-Approved Authorized Generics ready to ship today.
| Medication | Time to Work | Best For... |
|---|---|---|
| Miralax® (Osmotic) | 1–3 Days (Gentle) | Daily Regularity (Chronic Issues) |
| Dulcolax® (Stimulant) | 6–12 Hours (Fastest) | Immediate Relief (The "Now" Fix) |
| Colace® (Softener) | 12–72 Hours (Hydrating) | Comfort (No Straining) |
Miralax vs Dulcolax vs Colace Key Differences: The Short Answer
While all three treat constipation, they work in fundamentally different ways. Here is the quick breakdown of how they compare.
1. Miralax vs. Dulcolax
The Main Difference: Speed vs. Gentleness. Dulcolax (Stimulant) forces a contraction in 6–12 hours, making it best for immediate relief. Miralax (Osmotic) gently hydrates the stool over 1–3 days, making it safer for daily maintenance.
→ Deep Dive: Read our full guide on Miralax vs. Dulcolax (Side Effects & Safety)
2. Dulcolax vs. Colace
The Main Difference: Pushing vs. Softening. Dulcolax actively pushes waste out. Colace does not push; it only moistens the stool. Doctors often prescribe them together (Mush & Push) for post-surgery recovery.
→ Deep Dive: Read our full guide on Dulcolax vs. Colace
3. Miralax vs. Colace
The Main Difference: Effectiveness. Miralax is clinically proven to be more effective than Colace for actually producing a bowel movement. Colace is primarily for patients who need to avoid straining (e.g., hemorrhoids or stitches).
→ Deep Dive: Read our full guide on Miralax vs. Colace
How They Work
Miralax (Polyethylene Glycol 3350) is an osmotic laxative. It works by gently drawing water into your colon, which softens the stool and makes it easier to pass. Because it comes as a powder, many users ask about its taste. For tips, see our guide on how to make Miralax taste better.
Dulcolax (Bisacodyl) is a stimulant laxative. It works by stimulating the nerves in your intestinal walls, causing them to contract and push stool through the colon more quickly.
Colace (Docusate Sodium) is a stool softener. It works by allowing water and fats to mix into the stool, making it softer and easier to pass. It does not stimulate a bowel movement but makes it more comfortable when it happens.
Which Works Faster?
Dulcolax is the fastest, typically providing relief in 6 to 12 hours. Colace can take 12 to 72 hours, while Miralax is the most gradual, working over 1 to 3 days.
Which is Gentler? (Side Effects)
Miralax and Colace are the gentlest options. Miralax may cause some gas or bloating, and Colace has a rare chance of mild nausea. Dulcolax is more likely to cause side effects like stomach cramping and a sudden sense of urgency due to its stimulant action.
Which is Safer for Long-Term Use?
Miralax is widely considered the safest for long-term use for chronic constipation, as it is non-habit-forming. Colace is also gentle and has a low dependency risk. Dulcolax should only be used for short-term, occasional relief, as prolonged use can lead to dependency.
Direct Warehouse Supply: Generic Alternatives
National chains often run out of stock on these staples. Xeteor maintains a direct supply of the FDA-approved Authorized Generics. We bypass the retail markup to ship verified, factory-sealed bulk packs directly to your door.
- Generic Miralax (In Stock): GoodSense ClearLax (Polyethylene Glycol 3350) - 2 Pack
- Generic Dulcolax (In Stock): Major Bisacodyl 5mg Stimulant Laxative - 1000 Tablets (3 Pack)
- Generic Colace (In Stock): Major Docusate Sodium 250mg Softgels - 5 Pack
Miralax vs Dulcolax vs Colace: The Final Word
Choosing between these laxatives comes down to your specific need:
- For gentle and consistent relief from chronic constipation, choose Miralax (Polyethylene Glycol).
- For fast, urgent relief from occasional backup, choose Dulcolax (Bisacodyl).
- To prevent straining (especially after surgery), choose Colace (Docusate Sodium).
Important: If you're using these for colonoscopy prep, always follow your doctor's specific advice.
Need more options? Read our Buying Guides
If you aren't ready to buy the bulk packs above, explore our deep-dive guides to finding the best value for each brand:
- Miralax Options: Read the Guide to Miralax Generic Alternatives
- Dulcolax Options: Read the Guide to Dulcolax Generic Alternatives
- Colace Options: Read the Guide to Colace Generic Alternatives
Miralax vs Dulcolax vs Colace: Related Comparisons
- Miralax vs. Dulcolax: A Head-to-Head Comparison
- Miralax vs. Colace: Osmotic Laxative vs. Stool Softener
- Dulcolax vs. Colace: Stimulant vs. Stool Softener
GoodSense ClearLax Polyethylene Glycol 3350 Powder Osmotic Laxative - 17.9 oz | Miralax (2 Pack)
$34.99
GoodSense ClearLax Polyethylene Glycol 3350 Powder – 17.9 oz (2 Pack) | Compare to MiraLAX® Stock Up & Save: 60 Doses of Gentle Constipation Relief...… read more
View ProductRugby PEG Polyethylene Glycol 3350 Powder Osmotic Laxative - 17.9 oz | Miralax (2 Pack)
$37.99
Rugby PEG 3350 Polyethylene Glycol 3350 Powder – 17.9 oz (2 Pack) | Compare to MiraLAX® Stock Up & Save: 60 Doses of Gentle Constipation...… read more
View ProductMajor Bisacodyl Stimulant Laxative 5mg - 1000 Tablets | Dulcolax (3 Pack)
$27.99
Major Bisacodyl 5 mg – Stimulant Laxative Tablets | 3,000 Count (3 Pack) Stock up and save with our high-value 3-pack of Major Bisacodyl 5...… read more
View ProductMajor Docusate Sodium 250 mg - 100 Softgels | Extra Strength Colace (5 Pack)
$34.99
Major Extra Strength Docusate Sodium 250 mg – 500 Softgels (5 Pack) | Compare to Colace® Bulk Supply: 500 Softgels of Gentle Constipation Relief Major...… read more
View ProductAbout Xeteor
xeteor.com, founded in Las Vegas in 2018, is a trusted online guide and curated retailer for generic over-the-counter (OTC) medications. We operate like a family-owned business, prioritizing Supply Chain Stability and manufacturing transparency.
We are the creators of the Xeteor Rx Quality Ladder and the "Premium vs. Value" curation strategy. We use these frameworks to vet every product we sell.
Our portfolio includes:
- Premium Generics: GoodSense (Perrigo) and Foster & Thrive (McKesson).
- Specialist Brands: Reliable 1 Laboratories (High-Purity), Oncor Pharmaceuticals (US-Manufactured), and CareSens (Diabetes Care).
- Value Generics: Major Pharmaceuticals and Rugby Laboratories.
Recognized as a Top Rated seller on Trustpilot, Google, eBay, Amazon, and Walmart, we remain the authoritative source for honest generic drug advice. Our mission is to empower you with reliable products and educational content, all backed by a U.S.-based team that offers real human support and secure, senior-preferred payment options.
Shipping
Orders placed by 3:00 PM PST, Monday–Friday, ship the same day. We offer free nationwide shipping on orders over $30 and on all qualifying Savings Packs. Average delivery time is 3.3 business days. View our full shipping policy here.
Payment Methods
We accept Visa, Mastercard, Discover, American Express, PayPal, Venmo, Google Pay, and Apple Pay.
Risk-Free Returns
All purchases are backed by our 100-day satisfaction guarantee. Not happy with your order? Return it for free. View our complete return policy here.
Need Help?
We’re here for you. Reach out via:
- Phone:1-833-787-4777 (M–F, 9 AM–5 PM PST)
- Email:[email protected]
- Text:702-659-7022
Visit our full Contact Us page for more options.
Disclaimer: All generic medications approved by the FDA are considered safe and effective. The Xeteor Rx Quality Ladder creates a hierarchy based on manufacturing consistency, supply chain stability, and country of origin; it does not imply medical superiority. This content is for informational purposes only and is not a substitute for professional medical advice.
Important: Xeteor.com is a retailer of Over-the-Counter (OTC) products only. We do not sell, dispense, or fulfill prescription medications.
Frequently Asked Questions
What is the main difference between Miralax, Dulcolax, and Colace?
The difference is the mechanism. Miralax (Osmotic) draws water to soften stool over 1-3 days. Dulcolax (Stimulant) triggers contractions to push stool out in 6-12 hours. Colace (Softener) adds moisture to prevent straining but does not trigger a movement.
How do I choose between Miralax, Dulcolax, and Colace?
Choose Miralax for gentle, daily consistency. Choose Dulcolax for immediate, overnight relief (fastest). Choose Colace if you are recovering from surgery or have hemorrhoids and need to avoid straining.
Which laxative works the fastest?
Dulcolax (Bisacodyl) is the fastest, typically producing a bowel movement in 6 to 12 hours. Miralax takes 1-3 days to work. Colace is a softener and may take 12 to 72 hours to provide relief.
Which laxative is the gentlest?
Miralax and Colace are the gentlest options. Miralax works naturally with your body's water and is preferred for chronic constipation. Dulcolax is a stimulant and may cause cramping, so it is best for occasional use only.
Can you take Miralax and Dulcolax together?
Yes, doctors often prescribe them together. A common combination is the "Mush and Push" (Colace or Miralax to soften, Dulcolax to push). This is frequently used for colonoscopy prep or severe constipation.
Which one is safest for long-term use?
Miralax (Polyethylene Glycol) is widely considered the safest for long-term use because it is non-habit forming. Stimulant laxatives like Dulcolax should generally be used for short periods to avoid dependency.
Are the generic versions of Miralax, Dulcolax, and Colace the same?
Yes. Authorized Generics like GoodSense and Major Pharmaceuticals use the exact same active ingredients (Polyethylene Glycol 3350, Bisacodyl, and Docusate Sodium) as the brands. They are FDA-approved to provide the exact same clinical relief.
