Manevac Granules

What Are Manevac Granules and How Do They Help Constipation?

Constipation is one of the most common digestive complaints in the UK, affecting around one in seven adults at any given time. If you've been struggling with infrequent, hard, or painful stools, Manevac Granules offer a dual-action approach that tackles the problem from two angles at once. Available without a prescription, they combine a bulk-forming agent with a gentle stimulant laxative to help restore normal bowel function. You can browse our full range of constipation treatments if you'd like to compare your options before deciding.

Each tub contains granules made up of two active ingredients: ispaghula husk (54.2%) and senna fruit (12.4%). These work together to address both the consistency of your stool and the movement of your bowel — something that single-ingredient laxatives don't always manage on their own. It's a well-established combination that has been used in the UK for many years.

How Do Manevac Granules Work in the Body?

Understanding how a medicine works can help you use it more confidently. Manevac Granules act through two distinct but complementary mechanisms:

• Ispaghula husk is a natural dietary fibre derived from the seed husks of Plantago ovata. When it reaches your gut, it absorbs water and swells, increasing the bulk and softness of your stool. This makes it easier to pass without straining.
• Senna is a stimulant laxative that acts on the nerve endings in the wall of the large intestine. It encourages the muscles of the bowel to contract more regularly, helping to move stool along the digestive tract.
• Together, these two actions mean you get softer stools and improved bowel motility — addressing both the "what" and the "when" of going to the toilet.
• The stimulant effect of senna typically produces a bowel movement within 8–12 hours, while the bulk-forming effect of ispaghula husk builds over a few days of consistent use.

It's worth drinking plenty of water throughout the day when taking these granules. Ispaghula husk needs adequate fluid to work properly — without it, the granules could actually worsen constipation rather than relieve it.

Who Is Manevac Granules Suitable For?

Manevac Granules are suitable for adults and children over 12 years of age who are experiencing constipation. They're particularly useful when constipation is related to a low-fibre diet, reduced physical activity, or temporary lifestyle changes such as travel or illness. That said, they're not right for everyone.

You may find Manevac Granules helpful if you:

• Have occasional or short-term constipation and want a dual-action solution
• Need to soften stools after surgery, childbirth, or when straining is uncomfortable
• Have been advised by a healthcare professional to use a combined bulk-forming and stimulant laxative
• Prefer a granule format that can be swallowed easily with water

If you also experience symptoms such as bloating, cramping, or alternating constipation and diarrhoea, it may be worth exploring our IBS and cramps range, as these symptoms can sometimes point to an underlying condition that needs a different approach.

How Do Manevac Granules Compare to Other Laxatives?

How Should You Store Manevac Granules and Are They Clinically Suitable for You?

Store Manevac Granules below 25°C in a dry place, away from direct sunlight and out of reach of children. Once opened, ensure the lid is replaced firmly after each use to prevent moisture from affecting the granules. Do not use after the expiry date printed on the tub.

Clinically, Manevac Granules are not suitable for people with bowel obstruction, faecal impaction, sudden unexplained changes in bowel habit, or difficulty swallowing. If you are pregnant, breastfeeding, or taking other medicines, speak to your pharmacist before starting treatment. This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

What Are Manevac Granules and What Are They Used For?

Manevac Granules are an oral laxative preparation used for the short-term relief of constipation. They contain two active ingredients — ispaghula husk and senna fruit — which work together to soften stools and encourage regular bowel movements. The granules are taken by mouth with water and are available over the counter without a prescription.

Constipation is defined by the NHS as passing fewer than three stools per week, or passing stools that are hard, dry, and difficult to pass. Manevac Granules are designed to address this by increasing stool bulk and stimulating bowel contractions. They are not intended for long-term use and should not replace dietary and lifestyle changes such as increasing fibre intake, drinking more fluids, and staying physically active.

What Do You Need to Know Before Using Manevac Granules?

Before taking Manevac Granules, it's important to check whether they are appropriate for you. Do not take these granules if any of the following apply:

• You have a bowel obstruction or suspected bowel obstruction
• You have faecal impaction (a large mass of dry, hard stool stuck in the rectum)
• You have difficulty swallowing or a narrowing of the oesophagus
• You have experienced a sudden, unexplained change in bowel habit lasting more than two weeks
• You are under 12 years of age (unless directed by a doctor)
• You are allergic to ispaghula husk, senna, or any other ingredient in the product
• You have undiagnosed rectal bleeding

You should also be aware of the following potential drug interactions:

• Ispaghula husk may reduce the absorption of some medicines — take other medicines at least one hour before or after Manevac Granules
• Senna may interact with cardiac glycosides (such as digoxin) and antiarrhythmic medicines if used long-term, due to the risk of electrolyte imbalance
• Prolonged use of stimulant laxatives alongside diuretics or corticosteroids may increase the risk of low potassium levels (hypokalaemia)

If you are pregnant or breastfeeding, speak to your GP or midwife before using Manevac Granules. Senna is generally considered acceptable in pregnancy when used short-term, but professional guidance is always advisable.

How Should You Use Manevac Granules?

Always use Manevac Granules exactly as described on the label or as directed by your pharmacist. Follow these steps carefully:

1. Measure the correct dose using a level teaspoon
2. Place the granules on your tongue
3. Swallow immediately — do not chew or hold in your mouth
4. Follow immediately with a full glass of water (at least 200 ml)
5. Do not take immediately before going to bed

If you are also managing symptoms related to haemorrhoids, which can often accompany constipation, you may find our haemorrhoids and piles range helpful alongside your treatment.

What Are the Possible Side Effects of Manevac Granules?

Like all medicines, Manevac Granules can cause side effects, although not everyone experiences them. Most side effects are mild and tend to improve as your body adjusts to the treatment.

Common side effects (may affect up to 1 in 10 people):

• Flatulence (wind)
• Abdominal bloating or distension
• Abdominal cramping or discomfort
• Loose stools or diarrhoea if the dose is too high

Less common side effects (may affect up to 1 in 100 people):

• Nausea
• Allergic reactions, including skin rash or itching (rare but possible with ispaghula husk)
• Oesophageal or intestinal obstruction if taken without sufficient fluid

Stop taking Manevac Granules and seek immediate medical attention if you experience severe abdominal pain, rectal bleeding, or signs of a serious allergic reaction such as swelling of the face, lips, or throat.

How Should You Store Manevac Granules?

• Store below 25°C in a cool, dry place
• Keep away from direct sunlight and moisture
• Replace the lid firmly after each use
• Keep out of the sight and reach of children
• Do not use after the expiry date printed on the tub
• Do not dispose of medicines via wastewater or household waste — return unused medicines to your pharmacist

If you're looking to support your overall digestive health alongside constipation treatment, our vitamins and supplements range includes fibre supplements and digestive health products that may complement a balanced diet.