Rectal suppositories: practical tips

At a glance

Rectal suppositories can be an effective way to deliver medication for colorectal conditions, but the practical reality of using them is something most prescribers do not spend enough time explaining. Many people struggle with suppositories not staying in, not dissolving properly, or being uncomfortable to use.

This guide covers the common problems and practical solutions.

Common problems and solutions

The suppository keeps coming out

This is the most frequently described problem. It usually comes down to one of three factors:

Not inserted deep enough. The suppository needs to pass beyond the internal sphincter muscle — roughly two to three centimetres inside. If it sits in the anal canal rather than beyond the sphincter, the muscle will push it out.

Solution: Insert gently but firmly, using a lubricated finger to push the suppository past the point of resistance. You should feel it move past the sphincter.

Too warm before insertion. A warm, soft suppository is difficult to insert and more likely to deform and slip out.

Solution: Store suppositories in the fridge. A firm, cold suppository inserts more easily and has time to begin dissolving in place before it softens.

Not lying still long enough. Movement and gravity can contribute to expulsion.

Solution: Lie on your left side for at least fifteen to twenty minutes after insertion. Some people find that lying down for thirty minutes gives the best results.

The suppository does not seem to dissolve

If you find the suppository coming out apparently intact after some time:

• It may not have been in long enough — give it at least fifteen to twenty minutes
• It may have been inserted too shallow — try deeper insertion next time
• The rectum may have been too full — inserting after a bowel movement can help
• Check that you are removing the outer wrapping — this sounds obvious but it happens

Insertion is painful

If inserting the suppository causes significant pain:

• Use a small amount of water-based lubricant — not petroleum jelly, which can interact with some suppository coatings
• Ensure the suppository is cold and firm — warm, soft suppositories require more pressure
• Try gentle breathing during insertion — exhale slowly to relax the sphincter
• If you have a fissure, insertion may be painful regardless — ask your prescriber if there is an alternative delivery method

Leakage after dissolution

Some leakage of the melted suppository base is normal and does not mean the medication was not absorbed. Wearing a thin pad or liner can help with this.

A practical routine

1. Store suppositories in the fridge
2. Wash your hands thoroughly
3. Remove the wrapper
4. Apply a small amount of water-based lubricant if needed
5. Lie on your left side with your top knee drawn up toward your chest
6. Insert gently but firmly, pushing past the sphincter
7. Remain lying down for at least fifteen to twenty minutes
8. Wash your hands again

When to ask your prescriber

• If you consistently cannot retain the suppository despite trying these strategies
• If insertion causes severe pain every time
• If you are unsure whether the medication is being absorbed
• If you notice any adverse reactions

Your prescriber may be able to adjust the formulation, the timing, or suggest an alternative delivery method. Do not stop prescribed medication without discussing it first.