UK Pharmacy & Stoma Care · Interactive Checker + GP/Pharmacist Sheet

UK Stoma Medication & Tablet Absorption Checker (Ileostomy, Colostomy & Urostomy)

Check how 8 common UK tablet coatings and medicine groups behave with an ileostomy, colostomy, or urostomy, see why modified-release (MR/XL) pills may appear in your bag, and print a 1-page review sheet for your GP or community pharmacist.

Written by María G. · hola@siilostomy.com · Last updated: 14 November 20269 min read

Booking a free NHS New Medicine Service or Structured Medication Review ensures your prescriptions match your stoma type.

Quick answer

Medicine absorption depends on where along the gut each tablet is designed to dissolve. With an ileostomy, faster transit means modified-release (MR, SR, XL) and gastro-resistant / enteric-coated (EC) tablets can pass into your stoma bag unabsorbed. Golden rule: never crush, split, or stop prescribed medicines yourself—ask your GP or NHS pharmacist to check suitable standard-release, soluble, or liquid alternatives.

8 groupsUK tablet coatings & medicine classes covered
MR / XL / ECmost likely to pass unabsorbed in ileostomy
NHS reviewbring to your GP or community pharmacist
1-page A4free printable medicine review checklist

Filter tablet formulations & medicine classes by stoma type

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UK Pharmacy & Stoma Care · Interactive Checker + GP/Pharmacist Sheet

NHS safety note: Never crush, open, or stop taking any prescribed medicine without checking with your GP or pharmacist first.

UK Pharmacy & Stoma Care · Interactive Checker + GP/Pharmacist Sheet

Search a tablet type or class (e.g., modified release, gastro-resistant, liquid, pill, iron, water tablet...)

Your stoma type

Pharmacist review

Modified, Sustained & Prolonged-Release Tablets (MR, SR, XL, Retard)

High risk of incomplete absorption: MR/XL tablets are engineered for slow colonic transit and often appear whole in an ileostomy bag. Ask your GP or NHS pharmacist for standard-release, dispersible, or liquid options.

Pharmacist review

Enteric-Coated / Gastro-Resistant Tablets (EC / GR)

Gastro-resistant coatings can fail to dissolve fully before reaching an ileostomy. Never crush or halve EC tablets without asking your pharmacist first.

Preferred form

Oral Liquids, Soluble / Orodispersible Tablets & Sachets

Preferred formulations for ileostomates. Watch out for sugar-free liquid medicines sweetened with sorbitol, which can increase watery bag output.

Preferred form

Standard Uncoated Immediate-Release Tablets & Capsules

Normally break down rapidly in the stomach and upper small bowel for reliable uptake.

Pharmacist reviewU&Es / hydration watch

Stimulant Laxatives & Bowel Cleansing Preps

SAFETY ALERT: never take over-the-counter laxatives with an ileostomy—they cause rapid, severe dehydration. Always tell endoscopy units you have an ileostomy.

Clinical caution

Prescribed Anti-Motility Medicines (Loperamide / Codeine Phosphate)

When prescribed by your NHS team, taking doses 30–60 minutes before meals slows small-bowel transit; standard capsules or orodispersible melts are often preferred (check excipients).

Clinical cautionU&Es / hydration watch

Oral Contraceptive Pill, Antibiotics & Digoxin / Levothyroxine

Oral contraceptive pills may not absorb reliably with an ileostomy (discuss patch, implant, injection, or coil with your GP), and narrow-window medicines merit routine blood monitoring.

Clinical cautionU&Es / hydration watch

Diuretics ('Water Tablets'), SGLT2 Inhibitors, NSAIDs & Iron

Diuretics add kidney salt/water loss on top of ileostomy output—ensure regular U&E blood checks. Ferrous sulphate tablets turn output dark green/black.

UK stoma tablet coatings & medicine absorption chart

Spotting a tablet shell in your bag can mean lost dose—or occasionally a harmless empty matrix shell after the medicine has already absorbed. Your community pharmacist can check the BNF/SmPC in seconds. If loose output is speeding transit, see our UK stoma hydration & St Mark’s electrolyte calculator.

UK stoma tablet coatings & medicine absorption chart
Formulation / Medicine Class	Ileostomy Priority	Practical UK Stoma Care & Pharmacy Guidance
Modified, Sustained & Prolonged-Release Tablets (MR, SR, XL, Retard)	Pharmacist review	High risk of incomplete absorption: MR/XL tablets are engineered for slow colonic transit and often appear whole in an ileostomy bag. Ask your GP or NHS pharmacist for standard-release, dispersible, or liquid options.
Enteric-Coated / Gastro-Resistant Tablets (EC / GR)	Pharmacist review	Gastro-resistant coatings can fail to dissolve fully before reaching an ileostomy. Never crush or halve EC tablets without asking your pharmacist first.
Oral Liquids, Soluble / Orodispersible Tablets & Sachets	Preferred form	Preferred formulations for ileostomates. Watch out for sugar-free liquid medicines sweetened with sorbitol, which can increase watery bag output.
Standard Uncoated Immediate-Release Tablets & Capsules	Preferred form	Normally break down rapidly in the stomach and upper small bowel for reliable uptake.
Stimulant Laxatives & Bowel Cleansing Preps	Pharmacist review U&Es / hydration watch	SAFETY ALERT: never take over-the-counter laxatives with an ileostomy—they cause rapid, severe dehydration. Always tell endoscopy units you have an ileostomy.
Prescribed Anti-Motility Medicines (Loperamide / Codeine Phosphate)	Clinical caution	When prescribed by your NHS team, taking doses 30–60 minutes before meals slows small-bowel transit; standard capsules or orodispersible melts are often preferred (check excipients).
Oral Contraceptive Pill, Antibiotics & Digoxin / Levothyroxine	Clinical caution U&Es / hydration watch	Oral contraceptive pills may not absorb reliably with an ileostomy (discuss patch, implant, injection, or coil with your GP), and narrow-window medicines merit routine blood monitoring.
Diuretics ('Water Tablets'), SGLT2 Inhibitors, NSAIDs & Iron	Clinical caution U&Es / hydration watch	Diuretics add kidney salt/water loss on top of ileostomy output—ensure regular U&E blood checks. Ferrous sulphate tablets turn output dark green/black.

Four simple steps whenever you start a new prescription

Ask your pharmacy to record your stoma on your PMR
Having 'Ileostomy' or 'Colostomy' noted on your Patient Medication Record helps your pharmacist flag MR/EC tablets and OTC laxatives.
Request an NHS New Medicine Service (NMS) chat
In England and across UK community pharmacies, pharmacists can review newly prescribed medicines and liaise directly with your GP if a formulation swap is needed.
Watch for sorbitol in sugar-free liquid medicines
Liquid solutions absorb well, but large amounts of sorbitol sweetener in sugar-free syrups can loosen ileostomy output.
Remember your Medical Exemption Certificate ( England )
If you have a permanent stoma in England (under age 60), ask your GP/stoma nurse about form FP92A so all NHS prescriptions remain free of charge.

UK stoma medicines & tablet absorption FAQs

What should I do if I notice a whole tablet in my stoma bag?

Do not take an extra dose straight away. Note which tablet it appears to be and ring your community pharmacist, stoma care nurse, or GP—some tablets leave an empty outer casing, whereas MR/EC tablets may need switching to standard-release or liquid.

Is it safe to crush tablets if I have an ileostomy?

Never crush or split tablets unless a pharmacist confirms it is safe for that exact product. Crushing modified-release (MR/XL) or gastro-resistant (EC) tablets can release the entire dose at once.

Does the oral contraceptive pill work with an ileostomy?

Oral contraceptive pills may not be fully absorbed with an ileostomy, particularly if output is loose. NHS sexual health clinics and GPs usually advise considering non-oral methods such as the contraceptive patch, implant, injection, or coil (IUD/IUS).

Can I buy over-the-counter laxatives or painkillers with a stoma?

Always tell the pharmacy counter team what type of stoma you have: laxatives must be avoided in ileostomies, codeine-based painkillers thicken output (and can mask blockage), and NSAIDs like ibuprofen require caution.

More free SIIL interactive tools for UK ostomates

UK clinical pharmacy sources: Informed by NHS Specialist Pharmacy Service (SPS: Choosing Formulations in Patients with Enteral Tubes or Stomas), Colostomy UK, IA, and BNF Guidance. Educational guide only; always consult your NHS pharmacist or GP.

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