Reported by Simon Daniel Yusuph l Journalist at Weng Global
Pharmacists caution against crushing modified-release tablets without professional advice
Crushing certain medicines, particularly modified-release tablets, can alter the way active ingredients enter the body and potentially expose patients to excessive drug concentrations, severe side effects or treatment failure, pharmacists have warned.
The warning comes as pharmacists urge patients who have difficulty swallowing tablets to consult a doctor or pharmacist before changing the form of their medication.
Modified-release medicines are specially designed to release their active ingredients at a controlled rate, over a specific period or at a particular location in the digestive system. Crushing such medicines can destroy the mechanism responsible for that controlled release.
According to the UK National Health Service Specialist Pharmacy Service, modified-release preparations are generally unsuitable for crushing because doing so can cause the medicine to be released too quickly, potentially producing higher blood concentrations and toxic effects. In some cases, crushing can also cause the medicine to be released at the wrong location in the gastrointestinal tract, reducing its effectiveness.
Why crushing a tablet can change how a medicine works
Not all tablets are manufactured in the same way.
Some medicines are designed to dissolve immediately after they are swallowed, while others are formulated to release their active ingredients gradually. The latter may carry descriptions such as modified release (MR), sustained release (SR), extended release (XL), prolonged release or long acting (LA), depending on the product.
The protective or specialised structure of such medicines is part of the treatment itself.
When a modified-release tablet is crushed, the mechanism controlling the release of the drug may be damaged. Instead of receiving the medicine gradually, a patient may receive much of the dose within a much shorter period.
The NHS Specialist Pharmacy Service explains that this can result in higher blood levels and an increased risk of toxic effects. It also notes that some medicines may become less effective when their specialised formulation is disrupted.
The US Food and Drug Administration similarly advises that, where manipulation could compromise safety or effectiveness, extended-release tablets should be swallowed whole and not split, crushed or chewed.
Pharmacists warn of excessive drug exposure
Speaking to PUNCH Healthwise, Medical Director and Superintendent Pharmacist at Engraced Pharmacy, Idimu, Lagos, Jonah Okotie, said modified-release medicines are formulated to release their active ingredients at a particular rate, duration or location.
Okotie warned that crushing such medicines could expose patients to excessive amounts of the active ingredient at once and interfere with the intended therapeutic effect.
He said the consequences could include increased exposure to unwanted effects, medicine wastage and treatment failure.
Community Pharmacist with Pedov Healthcare Limited, Pedro Ebomese, also warned that crushing modified-release medicines could result in the entire dose entering the body within a short period rather than being released over the intended duration.
According to Ebomese, this could increase the risk of excessive drug levels and toxicity while leaving the patient with inadequate medicine coverage later in the dosing period.
The pharmacists advised patients who cannot swallow tablets to seek professional guidance instead of independently crushing their medication.
Not every tablet should be crushed
Health professionals stress that the warning does not mean every tablet is unsafe to crush.
The NHS Specialist Pharmacy Service states that whether a medicine can be crushed depends on its formulation and the properties of the individual drug. Some immediate-release tablets may be suitable for crushing, while modified-release and certain enteric-coated preparations may not be.
Some modified-release capsules contain granules, beads or pellets that may, for certain medicines, be removed from the capsule and administered without crushing the individual particles. The suitability of that approach depends on the specific medicine and its formulation.
This distinction is important because patients should not assume that a tablet can be crushed simply because another medicine in the same general category can be.
The US Food and Drug Administration also advises people who have difficulty swallowing medicines not to break, crush or chew tablets without first consulting a healthcare professional.
Difficulty swallowing requires a safer solution
Difficulty swallowing can make taking medicines challenging, particularly for older people, children and patients with certain medical conditions.
However, changing the physical form of a medicine without professional advice can introduce another risk.
Depending on the medication, a healthcare professional may be able to recommend a liquid, dispersible or immediate-release formulation, or determine whether a particular tablet can safely be divided or dispersed.
The appropriate alternative varies according to the medicine, dose and condition being treated. Patients therefore should not substitute or alter their medication on their own.
The NHS guidance recommends checking the specific medicine before crushing tablets or opening capsules and considering the formulation, including whether it has modified-release properties or a special coating.
Medication safety remains a wider public health issue
The warning forms part of a broader concern about medication safety.
The World Health Organisation says unsafe medication practices and medication errors are major causes of avoidable harm in healthcare systems. WHO estimates that medication-related harm accounts for nearly half of preventable harm in medical care.
WHO has therefore urged patients, caregivers and health professionals to take an active role in medication safety through its “Know. Check. Ask.” approach. The organisation says patients should be involved in understanding their medicines and asking healthcare professionals about their proper use.
The issue is particularly relevant where patients take several medicines at the same time, because an apparently simple change in how one medicine is administered can affect its safety or effectiveness.
WHO identifies high-risk situations, polypharmacy and transitions of care among the areas requiring particular attention in efforts to reduce medication-related harm.
What patients should do
Patients who find tablets difficult to swallow should avoid assuming that crushing them is harmless.
Before altering a medicine, they should check with a pharmacist, doctor or other qualified healthcare professional. The medicine’s packaging and prescribing information may also indicate whether it is modified release or otherwise unsuitable for crushing.
Particular caution is needed when labels contain terms such as MR, SR, XL or LA, although patients should still seek professional advice because product formulations differ.
Healthcare professionals can determine whether the medicine can be safely modified or whether another formulation would be more appropriate.
The central message from pharmacists and medication-safety authorities is therefore straightforward: a tablet’s physical form can be an important part of how the medicine works, and changing that form without professional guidance can create avoidable risks.
Why it matters
For patients in Nigeria and elsewhere, the warning highlights the importance of proper counselling when medicines are dispensed.
A medicine that is taken incorrectly may fail to provide the expected treatment benefit or may expose the patient to unnecessary harm. Professional advice can help determine whether a tablet should be swallowed whole, divided, dispersed or replaced with another formulation.
As medication use becomes increasingly complex, understanding how medicines are designed to work remains an important part of protecting patients and improving treatment outcomes.
What happens next
Patients who are already crushing a modified-release or specially coated medicine should speak with their pharmacist or prescribing clinician before making further changes.
They should not abruptly stop essential prescription medication unless advised to do so by a qualified healthcare professional.
Pharmacists and doctors can review the specific medicine, determine whether its formulation can be altered safely and, where necessary, recommend an appropriate alternative.
For patients, the safest approach is to check before crushing, rather than discovering afterwards that the medicine no longer works as intended.
Weng Global – Stories beyond borders
Sources
- PUNCH Healthwise — reporting by Iyanuoluwa Abiola on pharmacists’ warnings about crushing modified-release medicines.
- UK National Health Service Specialist Pharmacy Service — guidance on crushing tablets and opening capsules.
- U.S. Food and Drug Administration — guidance on administration of modified-release dosage forms.
- World Health Organization — Medication Without Harm and medication-safety guidance.
