Glycerin suppositories: when to use

Published 13 March 2026 ·Last reviewed 13 March 2026 by the editorial team ·How we create our content

At a glance

Glycerin suppositories are a commonly used option for short-term relief of constipation. They work locally in the rectum, drawing water in and stimulating a bowel movement — typically within fifteen minutes to an hour. They are available without prescription from most pharmacies.

This guide covers when glycerin suppositories are helpful, how to use them, and what to be aware of.

When they are commonly used

Glycerin suppositories are most often used for:

  • Occasional constipation when a bowel movement has not happened for several days
  • Before or after procedures when a gentle, controlled bowel movement is needed
  • When oral laxatives are too slow — suppositories act faster because they work locally
  • For people who have difficulty swallowing oral medications

They are not typically used as a first-line daily treatment for chronic constipation — oral approaches (fibre, osmotic laxatives, stool softeners) are usually preferred for ongoing management.

How to use them

Practical steps

  1. Wash your hands
  2. Remove the suppository from its wrapper
  3. If it is soft, you can firm it up briefly by running cold water over it (still in the wrapper)
  4. Lie on your left side with your right knee drawn up toward your chest
  5. Gently insert the suppository, pointed end first, into the rectum — approximately two to three centimetres
  6. Remain lying down for fifteen to twenty minutes to allow the suppository to work
  7. When you feel the urge to have a bowel movement, go to the toilet

Tips from common experience

  • A small amount of water-based lubricant on the tip can make insertion easier
  • The urge may come quickly — stay near a bathroom
  • Try to hold the suppository for at least fifteen minutes for full effect
  • If the suppository is expelled before it dissolves, it may not have had time to work

What to expect

  • A bowel movement typically within fifteen minutes to one hour
  • The stool may be softer than usual
  • Some people experience mild cramping as the suppository works
  • The effect is limited to the current bowel movement — it does not change ongoing bowel function

When they are not the right choice

  • As a daily long-term solution — frequent use suggests the underlying constipation needs different management
  • With significant rectal pain or active inflammation — insertion may be uncomfortable or harmful
  • After certain surgeries — check with your surgical team before using anything rectally
  • When there may be a bowel obstruction — if you have severe pain, bloating, and no gas passage, seek medical attention rather than using a suppository

When to see a clinician

If you find yourself needing glycerin suppositories regularly — more than once or twice a week — that is a signal that the constipation may benefit from a different approach. Your GP or pharmacist can help identify a more sustainable plan.

Common questions

How quickly do glycerin suppositories work?

Most people describe them working within fifteen minutes to an hour. They act locally in the rectum, drawing water in and stimulating a bowel movement. This is faster than oral laxatives, which is why they are often used for more immediate relief.

Can I use glycerin suppositories with a fissure?

Some people with fissures use them, particularly when constipation is making things worse. However, insertion can be uncomfortable with an active fissure. If you are considering this, discussing it with your clinician first is reasonable — they may suggest alternatives or advise on technique.

Are glycerin suppositories safe to use regularly?

They are generally considered safe for occasional use. Using them every day long-term is not typically recommended — regular reliance may indicate that the underlying constipation needs different management. If you find yourself needing them frequently, discuss this with a clinician.

How do glycerin suppositories work?

They work by drawing water into the rectum through osmosis, which softens the stool, and by mildly irritating the rectal lining, which stimulates the urge to have a bowel movement. The effect is local — they do not affect the whole digestive system.

Can I use glycerin suppositories after anal surgery?

This depends on the surgery and your surgeon's advice. Some surgical teams recommend them as a way to ensure the first bowel movement happens without excessive straining. Others prefer oral softeners only. Always check with your care team before using anything rectally after surgery.

When to seek care Heavy bleeding or feeling faint? Get emergency help now. Emergency: 911

Not sure how urgent it is? Get help today.

  1. Emergency

    Heavy bleeding, black tarry stools, feeling faint, severe pain or trouble breathing.

    Call 911 or go to the ER.

  2. Today

    Fever, pain getting worse, a hot swollen lump, or trouble passing urine.

    Call your doctor or go to urgent care.

  3. Soon

    Bleeding or bowel changes nobody has checked, or anything lasting 3 weeks.

    Book a doctor’s appointment.

Feeling overwhelmed? Call or text 988, any time.

See all the signs

For this topic, get medical advice if you notice:

  • No bowel movement despite suppository use — seek advice
  • Severe abdominal pain or bloating
  • Rectal bleeding that is new or heavy
  • Persistent constipation that does not respond to self-care

Recording how you feel is not the same as being checked. These are the signs that need a doctor’s attention.

Call 911 or go to the emergency room now if you have:

  • bleeding that will not stop, a lot of blood (the toilet water turns red, or you pass large clots), or any bleeding with feeling faint or dizzy
  • fainting, a racing heart or trouble breathing
  • confusion or slurred speech, extreme shivering, no urine in a day, or blotchy skin
  • sudden severe belly pain, or a swollen, hard belly with vomiting or not passing stool or gas
  • you cannot pass urine at all, or your bladder feels full and painful and you can’t empty it
  • redness, swelling or severe pain spreading quickly around your anus, genitals or groin, especially with a fever or feeling very ill
  • a fever with a painful swelling near your anus if you have diabetes or a weakened immune system (for example, from chemotherapy or transplant medicines)
  • black, tarry stools

Call your doctor or go to urgent care today (or the ER if you can’t be seen today) if you have:

  • a temperature of 100.4°F (38°C) or higher, chills, vomiting, or feeling generally unwell
  • pain that is getting worse over days, or severe pain that stops you sitting or sleeping
  • a hot, swollen or very tender lump near your anus or at the top of the crease between your buttocks, or foul-smelling discharge
  • trouble urinating
  • bleeding that is getting heavier or more frequent, or blood mixed into your stool
  • feeling much more tired than usual, looking pale, or getting out of breath more easily than you used to
  • not passing stool for several days, or new belly pain

Make an appointment with your doctor if:

  • you have never had these symptoms checked by a doctor or nurse — whatever your age
  • you have had rectal bleeding for more than 3 weeks
  • your bowel movements have been looser, thinner or more frequent than usual for 3 weeks or more, or you have lost weight without trying
  • symptoms have not settled after a week or so, or keep coming back
  • you notice a new lump near your anus, between your buttocks or in your belly, or an itch or discharge that does not clear
  • you have new leakage or trouble controlling your bowels
  • you are 45 or over, or have a family history of bowel cancer or inflammatory bowel disease, and any of these symptoms are new for you

If you are unsure, it is always reasonable to ask. If things feel overwhelming, call or text 988 (Suicide & Crisis Lifeline) or chat at 988lifeline.org, any time. If you don’t feel safe, call 911.

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