Senna for constipation
Senokot
נבדק על ידי Sid Dajaniעודכן לאחרונה על ידי Michael Stewart, MRPharmSLast updated 12 Nov 2024
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Senna can take 8-12 hours to have an effect. It is best taken in the evening.
If you are still constipated after taking senna for three days, make an appointment to speak with your doctor.
Eating a healthy diet, drinking plenty of water and getting regular gentle exercise can all help prevent constipation.
At a glance
Senna is a stimulant laxative used to treat constipation.
It encourages bowel muscles to move stools and usually works within 8-12 hours.
Take senna in the evening, typically for only a few days.
Do not take senna if you suspect a blockage.
Stop taking senna if you experience stomach pain, cramp, or diarrhoea.
See a doctor if constipation continues after three days or if taking it for a child under 12.
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המשך לקרוא למטה
About senna
סוג התרופה | A stimulant laxative |
שימוש עבור | עצירות |
נקרא גם | Senokot® |
זמין כ | טבליות ותרופות נוזליות לבליעה |
Constipation is a common problem. It can mean either going to the toilet less often than usual to empty your bowels, or passing hard or painful stools. Constipation can be caused by a number of things. Not eating enough fibre or not drinking enough fluid can cause constipation. Some conditions (such as pregnancy) can cause constipation, as can a lack of exercise or movement (such as being ill in bed) and some medicines.
Often, increasing the amount of fibre in your diet (such as by eating more fruit, vegetables, cereals, and wholemeal bread) and drinking plenty of water each day can effectively prevent or relieve constipation.
You could be recommended senna as a laxative to help relieve constipation if you cannot increase the fibre in your diet, or if this is insufficient. Senna works by encouraging the muscles in your bowel to move stools through your body. This helps you to go to the toilet. It usually has an effect within 8-12 hours. It is available to buy without a prescription at pharmacies and other retail outlets.
Before taking senna
חזרה לתוכןTo make sure that this is the right treatment for you, before you start taking senna it is important that you speak with your doctor or a pharmacist if:
You are pregnant or breastfeeding. This is because, if you are expecting a baby or breastfeeding, medicines should only be taken on the advice of a doctor or nurse.
It is intended for a child under 12 years old. Laxatives should only be given to children on the advice of a doctor, or a healthcare professional experienced in the management of constipation in children.
You are so constipated that you think you may have a blockage.
You are taking or using any other medicines. This includes any medicines you are taking which are available to buy without a prescription, as well as herbal and complementary medicines.
אי פעם הייתה לך תגובה אלרגית לתרופה.
המשך לקרוא למטה
How to take senna
חזרה לתוכןBefore taking senna, read the manufacturer's printed information leaflet from the pack. It will give you more information about the medicine and will provide you with a full list of the side-effects which you could experience.
The usual adult dose is two to four 7.5 mg tablets, or two to four 5 ml spoonfuls (10-20 ml) of liquid medicine once a day. Take senna in the evening. It should only be used for a few days - this is because your bowel can start to rely on this type of laxative to make it work rather than working on its own. If you are still constipated after taking senna for three days, you should make an appointment to speak with your doctor.
If a doctor or healthcare professional has recommended senna for your child, check the label on the pack carefully to make sure that you give the correct dose for the age of your child.
להפיק את המרב מהטיפול שלך
חזרה לתוכןIt is important for you to drink plenty while you are constipated. Adults should aim to drink at least two litres (about 8-10 cups) of fluid per day. Most sorts of drink will do but, as a start, try just drinking a glass of water 3-4 times a day in addition to what you normally drink.
Try to eat a balanced diet containing high-fibre foods such as wholemeal and wholegrain breads and cereals, fruit and vegetables, brown rice and wholemeal pasta. If you are not used to a high-fibre diet, it may be best to increase the amount of fibre you eat gradually.
Keeping your body active will help you to keep your digestive system moving, so try to take some regular daily exercise.
You may wish to include some foods in your diet that contain sorbitol. Sorbitol is a naturally occurring sugar. It is not digested very well and draws water into your bowel which has an effect of softening stools. Fruits (and their juices) which have a high sorbitol content include apples, apricots, gooseberries, grapes (and raisins), peaches, pears, plums, prunes, raspberries and strawberries.
You can read more about how to prevent or treat constipation in the separate condition leaflets called עצירות (for adults) and Constipation in children.
המשך לקרוא למטה
Can senna cause problems?
חזרה לתוכןAlong with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the ones which can occur with senna. You will find a full list in the manufacturer's information leaflet supplied with your medicine. Speak with your doctor or pharmacist if any of the following continue or become troublesome.
Side-effects of senna | מה אני יכול לעשות אם אני חווה את זה? |
Stomach pain or cramp, diarrhoea | Stop taking senna |
If you experience any other symptoms which you think may be due to senna, please speak with your doctor or pharmacist for further advice.
How to store senna
חזרה לתוכןשמור את כל התרופות מחוץ להישג ידם וראייתם של ילדים.
יש לאחסן במקום קריר ויבש, הרחק מחום ואור ישיר.
מידע חשוב על כל התרופות
חזרה לתוכןמידע חשוב על כל התרופות
אם אתה קונה תרופות כלשהן, בדוק עם רוקח שהן בטוחות לשימוש עם התרופות האחרות שלך.
לעולם אל תיקח יותר מהמינון שנקבע. אם אתה חושד שאתה או מישהו אחר אולי לקח מנת יתר של תרופה זו, פנה למחלקת תאונות וחירום בבית החולים המקומי שלך. קח את המיכל איתך, אפילו אם הוא ריק.
אם אתה עובר ניתוח או טיפול שיניים, אמור לאדם שמבצע את הטיפול אילו תרופות אתה נוטל.
Do not keep out-of-date or unwanted medicines. Take them to your local pharmacy who will dispose of them for you.
אם יש לך שאלות לגבי התרופה הזו, שאל את הרוקח שלך.
דווח על תופעות לוואי לתרופה או חיסון
אם אתה חווה תופעות לוואי, תוכל לדווח עליהן באינטרנט דרך ה Yellow Card website.

לא בטוחים לגבי ערבוב תרופות?
בדוק אינטראקציות אפשריות בין תרופות, תוספים ומזונות לפני נטילתם יחד.
שאלות נפוצות
What are the common causes of constipation?
Constipation can be caused by various factors, including not consuming enough fibre or fluids, certain conditions like pregnancy, a lack of physical activity (such as being ill in bed), and as a side effect of some medicines.
When should I consider using senna for constipation?
Senna may be recommended if you are unable to increase the fibre in your diet sufficiently, or if increasing fibre alone has not relieved your constipation. It works by stimulating your bowel muscles to help move stools, typically taking effect within 8-12 hours.
Are there any specific situations where I should avoid taking senna or consult a professional first?
Yes, you should speak to a doctor or pharmacist before taking senna if you are pregnant or breastfeeding, if it's for a child under 12, if you suspect you have a bowel blockage due to severe constipation, if you are taking any other medicines (including non-prescription, herbal, or complementary ones), or if you have a history of allergic reactions to medicines.
How should I take senna, and for how long?
Senna should be taken in the evening. The usual adult dose is two to four 7.5 mg tablets, or two to four 5 ml spoonfuls (10-20 ml) of liquid medicine, once a day. It should only be used for a few days, as long-term use can make your bowel reliant on the laxative. If constipation persists after three days, you should consult your doctor.
What measures can I take to prevent constipation besides using medication?
To prevent or relieve constipation, it's important to drink plenty of fluids (adults should aim for at least two litres daily), eat a balanced diet rich in high-fibre foods like wholemeal breads, cereals, fruits, and vegetables, and get regular daily exercise to keep your digestive system active. You might also consider including foods with sorbitol, such as apples, prunes, and pears, which can help soften stools.
What should I do if I experience stomach pain, cramp, or diarrhoea while taking senna?
If you experience stomach pain, cramp, or diarrhoea, you should stop taking senna. If these or any other uncomfortable symptoms continue or become troublesome, you should speak with your doctor or pharmacist for advice. For a full list of side-effects, refer to the manufacturer's leaflet provided with your medicine.
קריאה נוספת והפניות
- Manufacturer's PIL, Senokot® 7.5 mg Tablets Adult; Reckitt Benckiser Healthcare (UK) Ltd, The electronic medicines Compendium. Dated August 2021.
- Manufacturer's PIL, Senokot® 7.5 mg/5ml Syrup 12 Years Plus; Forum Health Products Ltd, The electronic Medicines Compendium. Dated May 2024.
- תרופות מלאות BNF מהדורה 89; האגודה הרפואית הבריטית והחברה המלכותית לפרמקולוגיה של בריטניה הגדולה, לונדון.
המשך לקרוא למטה
About the authorView full bio

מייקל סטיוארט, MRPharmS
Medicine Leaflet Review Manager – Contractor, Pharmacist
BPharm (Hons), MRPharmS
Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.
About the reviewer

סיד דג'אני
Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.
היסטוריית המאמר
המידע בעמוד זה נכתב ונבדק על ידי קלינאים מוסמכים.
Next review due: 25 Nov 2027
12 Nov 2024 | הגרסה האחרונה

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