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Constipation Relief Options: A Pharmacist’s Guide

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Constipation Relief Options: A Pharmacist’s Guide

Constipation is one of the most common digestive complaints, along with issues like heartburn and indigestion. It affects people of all ages. It’s usually described as having fewer than three bowel movements per week, or stools that are hard, dry, and difficult to pass. While occasional constipation is normal, chronic or severe constipation can be uncomfortable and disruptive.

There are many possible causes, including low fiber intake, dehydration, a sedentary lifestyle, and even certain medications. The good news is that for most people, simple lifestyle changes and over-the-counter (OTC) options can provide safe and effective relief. In this article, I’ll walk you through the different remedies available and highlight when it’s best to seek professional help.

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When to See a Doctor First

Before turning to OTC solutions, it’s important to recognize situations where constipation may be a sign of something more serious. You should see a healthcare provider promptly if you experience:

  • Sudden or severe constipation that is very different from your usual pattern
  • Blood in your stool or black, tarry stools
  • Unexplained weight loss
  • Persistent constipation that lasts for several weeks despite lifestyle changes or OTC treatments
  • Severe abdominal pain, vomiting, or bloating

These “red flag” symptoms could indicate an underlying condition that needs medical evaluation. For everyone else, OTC options and healthy habits are generally safe to try for short-term relief.

Lifestyle & Dietary Measures (First Line of Relief)

Before reaching for medications, many cases of constipation can be managed with simple lifestyle adjustments. These strategies are safe, effective, and form the foundation of long-term digestive health:

  • Increase fiber intake – Aim for 25–30 grams of fiber per day from foods like whole grains, fruits, vegetables, beans, and seeds. Fiber adds bulk to stool and helps it move through the intestines more easily.
  • Stay well hydrated – Staying hydrated is key — just like when managing cold and flu symptoms. Water softens stool and keeps the digestive system moving. Most adults should aim for 6–8 glasses of water per day, though needs vary by activity level and climate.
  • Get regular exercise – Physical activity stimulates bowel function. Even a daily 20–30 minute walk can improve regularity.
  • Establish a routine – Try to go to the bathroom at the same time each day, especially after meals, when the natural gastrocolic reflex is strongest. Don’t ignore the urge to have a bowel movement.
  • Limit constipating foods – Reduce intake of processed foods, excessive cheese, and low-fiber snacks, which can worsen constipation.

These simple measures are often enough to restore healthy bowel function. If constipation persists despite lifestyle changes, OTC options can provide safe short-term relief.

OTC Options for Constipation Relief

When lifestyle changes aren’t enough, several over-the-counter (OTC) remedies are available. Each type works in a different way, and the best choice depends on your situation, age, and overall health.

1. Bulk-Forming Laxatives

  • Examples: psyllium (Metamucil®), methylcellulose (Citrucel®), polycarbophil (FiberCon®)
  • How they work: Add bulk and water to stool, making it softer and easier to pass.
  • When to use: Ideal for long-term use; generally safe and well-tolerated.
  • Cautions: Must be taken with enough water; may cause bloating or gas at first.

Psyllium fiber supplements like Metamucil help add bulk and softness to stools, making them easier to pass. They’re one of the safest long-term options for promoting regularity — especially if your diet is low in fiber. Just be sure to take each dose with plenty of water to prevent bloating or blockage.
👉 Metamucil Psyllium Husk Powder Supplement

2. Stool Softeners

  • Examples: docusate sodium (Colace®)
  • How they work: Help mix water into stool, making it softer.
  • When to use: Good for people who should avoid straining (after surgery, during pregnancy).
  • Cautions: Mild effect; not very strong for chronic constipation.

Docusate (e.g., Colace) helps draw water into stool so it’s softer and easier to pass, without stimulating the bowels. This is a good option for people who should avoid straining, such as after surgery, during pregnancy, or with hemorrhoids. It works gently but may be less effective for long-standing constipation on its own.
👉 Colace Docusate Sodium Stool Softener Capsules

3. Osmotic Laxatives

  • Examples: polyethylene glycol 3350 (PEG, RestoraLAX®), lactulose, milk of magnesia
  • How they work: Pull water into the intestines, softening stool and increasing frequency.
  • When to use: Effective for short- or medium-term relief; PEG is often first choice.
  • Cautions: May cause bloating or cramping; avoid magnesium-based products in kidney disease.

Polyethylene glycol (PEG), found in products like RestoraLAX, gently draws water into the intestines to soften stool and increase movement. It’s a trusted first-line option for both adults and children, and it’s great when you need reliable relief without harsh cramping. Works best when used daily for a few days until bowel habits normalize.
👉 RestoraLAX Powder Stool Softener Laxative and RestoraLAX Pre-Measured Single Dose Sachets

Milk of Magnesia (Magnesium Hydroxide) is a dual-purpose product that works as both a laxative and an antacid. As a laxative, it draws water into the intestines to soften stool and promote bowel movements. As an antacid, it can also help neutralize stomach acid and relieve occasional heartburn or indigestion. It’s best used occasionally, and should be avoided in people with kidney disease due to magnesium content.
👉 Bayer Phillips Milk of Magnesia

4. Stimulant Laxatives

  • Examples: senna (Senokot®), bisacodyl (Dulcolax®)
  • How they work: Stimulate the muscles of the intestines to contract.
  • When to use: Good for occasional, short-term use when other options don’t work.
  • Cautions: Not recommended for daily or long-term use; can lead to dependence or worsen constipation over time.

Senna (e.g., Senokot) stimulates the intestines to contract, helping move stool along when you’re feeling backed up. It’s effective for occasional constipation or when other options haven’t worked. Because stimulants can cause cramping or dependence with frequent use, it’s best kept as a short-term solution.
👉 Senokot Natural Laxative

Bisacodyl (e.g., Dulcolax) tablets or suppositories offer more active stimulation of the bowels, often producing results within several hours. It’s helpful when you need fast, reliable relief — such as after several days without a bowel movement. Avoid daily use, and use only as needed to prevent reliance.
👉 Dulcolax Bisacodyl Tablets

5. Rectal Options

  • Examples: glycerin suppositories, phosphate enemas
  • How they work: Act quickly in the rectum to soften stool or stimulate a bowel movement.
  • When to use: For immediate relief, especially in children or severe constipation.
  • Cautions: Shouldn’t be used frequently; check with a healthcare provider for safe use.

Glycerin suppositories work quickly by drawing water into the rectum, helping soften stool and stimulate movement. They’re gentle and provide rapid relief when stool is sitting low in the bowel. Best for occasional use when you need fast results.
👉 Colace Glycerin Suppositories

nfographic of constipation relief options – bulk-forming laxatives, stool softeners, osmotic laxatives (draws water into stool), stimulant laxatives, and rectal options – pharmacist health blog Canada

Special Populations

Constipation management isn’t “one-size-fits-all.” Certain groups need extra care when choosing treatments:

Children

  • Preferred option: Polyethylene glycol (PEG, RestoraLAX®) is often recommended as first-line.
  • Alternatives: Glycerin suppositories can be used for quick relief.
  • Cautions: Avoid frequent stimulant laxatives; always consult a pediatrician for persistent constipation.

Elderly Adults

  • Challenges: More likely to be on multiple medications that cause constipation (e.g., opioids, calcium channel blockers, iron).
  • Preferred options: Bulk-forming agents or PEG are safe and effective.
  • Cautions: Avoid overuse of stimulant laxatives; dehydration can worsen constipation and complicate treatment.

Pregnancy

  • Preferred options: Bulk-forming laxatives and stool softeners (like docusate) are considered safe.
  • Cautions: Avoid mineral oil and stimulant laxatives unless recommended by a healthcare provider.
  • Tip: Adequate fiber, fluids, and light exercise should always be the first step.

Chronic Kidney Disease

  • Preferred options: Lactulose, polyethylene glycol (PEG, RestoraLAX)
  • Cautions: Magnesium-based laxatives (Milk of Magnesia, magnesium citrate), sodium phosphate preparations (Fleet Enema)
  • Tip: Increase fiber intake through diet! Here is a list of high-fiber foods.

Safety & Risks of OTC Constipation Remedies

While over-the-counter laxatives are generally safe for short-term use, it’s important to understand their potential risks and limitations:

  • Overuse of stimulant laxatives – Frequent use of senna or bisacodyl may lead to dependence, where the bowels rely on them to function. Over time, this can worsen constipation instead of improving it.
  • Bloating and gas – Bulk-forming laxatives (like psyllium) can cause temporary bloating, gas, or cramping, especially if you increase fiber too quickly.
  • Dehydration and electrolyte imbalance – Osmotic and stimulant laxatives may lead to dehydration, low potassium, or other electrolyte issues if overused.
  • Kidney concerns – Magnesium-containing laxatives (like milk of magnesia) should be avoided in people with kidney problems.
  • Not for long-term use – Most OTC products are intended for occasional relief. Constipation that persists beyond a few weeks requires medical evaluation.

Conclusion & Key Takeaway

Constipation is a common issue that can usually be managed with a combination of healthy lifestyle choices and safe over-the-counter remedies. For most people, increasing fiber, staying hydrated, and exercising regularly should be the first steps. When additional help is needed, options like bulk-forming agents, stool softeners, osmotic laxatives, or occasional stimulants can provide short-term relief.

Remember, laxatives are not meant to replace long-term healthy habits. If constipation is persistent, severe, or accompanied by red flag symptoms like blood in the stool or unexplained weight loss, it’s important to seek medical advice.

✅ Key takeaway: Use OTC products wisely, combine them with lifestyle improvements, and don’t hesitate to reach out to a healthcare professional if constipation continues to be a problem.

Looking for more digestive health advice? Check out my guide on heartburn and indigestion relief.

If you found this article helpful, you may also enjoy these pharmacist-approved guides:

👉 Cold & Flu Remedies in Canada: A Pharmacist’s Guide
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👉 What to Keep in Your Travel First Aid Kit

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