Relative contraindications in medications occur when a specific drug may pose risks to a patient but could still be used if the potential benefits outweigh those risks. These are different from absolute contraindications, where the medication should never be used under any circumstance.
In relative contraindications, the decision to give the medication depends on careful assessment by healthcare professionals. They weigh the likelihood of harm against the potential therapeutic benefit for the individual.
Understanding the concept of relative contraindications is important because there are circumstances where withholding a medication might lead to worse outcomes for a patient than the risks of prescribing it.
Examples of Relative Contraindications
There are several instances where relative contraindications are commonly encountered in healthcare. The risks depend on the patient’s condition, overall health, and other factors.
Here are some examples:
- NSAIDs (Non-Steroidal Anti-Inflammatory Drugs): Ibuprofen is a painkiller of this type and is not suitable for everyone. The NHS lists, for example, a stomach ulcer or a heart, liver or kidney condition as reasons it may not be suitable. Whether it is used is a decision for the prescriber or pharmacist, so check the NHS ibuprofen advice and the patient information leaflet.
- Pregnancy: Some medicines can affect an unborn baby, so anyone who is pregnant or trying to get pregnant should check with a pharmacist, midwife or GP before taking any medicine, and should not stop a prescribed medicine without checking with their doctor. See the NHS guidance on medicines in pregnancy.
- Asthma and Beta Blockers: Beta blockers are not suitable for everyone. The NHS lists a breathing problem such as asthma among the reasons they may not be suitable, so anyone with asthma should tell the prescriber before starting one. If you are unsure, ask the prescriber or pharmacist. See the NHS beta blockers page.
Why Relative Contraindications Are Important
Relative contraindications highlight the need for informed decision-making in healthcare. Unlike absolute contraindications, they allow some flexibility, meaning a drug could be used safely if appropriate precautions are taken.
They are important for the following reasons:
- Balancing Risks and Benefits: In cases where untreated conditions could worsen the patient’s health, relative contraindications give healthcare teams the option to find safe, customised solutions.
- Allowing Essential Treatments: If no alternative treatment exists, prescribing medications under relative contraindications ensures the patient doesn’t miss out on potentially life-saving care.
- Encouraging Monitoring: Drugs prescribed under these circumstances come with special instructions to monitor the patient closely, improving safety.
Factors Considered Before Prescribing
When deciding whether to prescribe a medication with a relative contraindication, healthcare providers consider several factors specific to the patient.
These include:
- Severity of the Condition Being Treated: What level of treatment is required? If a condition is mild, alternative therapies might be explored instead of using the relatively contraindicated drug.
- Presence of Safer Alternatives: If an equally effective medication with fewer risks is available, that option might be chosen first.
- Risk of Worsening Underlying Conditions: If the medication could significantly exacerbate an existing condition, it is less likely to be prescribed.
- Patient Age: Older adults may be more vulnerable to side effects and need extra caution.
- Health of Vital Organs: The function of organs like the liver, kidneys, and heart determines whether the body can process certain drugs without harm.
- Dose and Duration of Treatment: Sometimes, a lower dose of a relatively contraindicated drug for a short period might reduce the potential risks.
- Patient Preferences: Patients often play an active role in deciding whether to take certain medications, especially if the risks need balancing.
Examples from Practice
Relative contraindications arise frequently in clinical practice where balancing risks and benefits allows patients to receive necessary treatment.
Example:
A prescriber is considering a medicine that carries some risk for a patient with an existing health condition. The prescriber explains the risks and benefits, agrees a plan with the patient, arranges monitoring and reviews how it is going.
This example shows how healthcare professionals assess risks and adapt treatment plans to accommodate individual patient needs while mitigating dangers.
Precautions When Prescribing with Relative Contraindications
When a medication with a relative contraindication is prescribed, doctors and other healthcare professionals take additional precautions to balance safety and effectiveness.
These precautions often include:
- Adjusting Dosage: Prescribing the lowest effective dose can help reduce the risk of side effects.
- Monitoring Side Effects: Regular check-ups and communication with the patient allow the medical team to quickly detect and manage any adverse reactions.
- Providing Instructions for Safe Use: Patients might be instructed to take the medication with or without food, avoid alcohol, or follow specific schedules.
- Regular Testing: Blood tests or imaging may be performed to track liver, kidney, or heart function while the patient takes the medication.
Difference Between Absolute and Relative Contraindications
Absolute and relative contraindications differ in their level of risk and level of flexibility.
| Feature | Absolute Contraindications | Relative Contraindications |
|---|---|---|
| Risk Level | Severe and life-threatening | Potential but not always severe |
| Flexibility | Medication should not be given | Medication MAY be given if benefits outweigh risks |
| Possible Actions | Another treatment is normally considered. The prescriber decides; see NHS medicines A to Z. | Medication might be prescribed with precautions |
| Examples | A medicine the person is known to be allergic to | A medicine that carries extra risk for the person’s condition, used only on the prescriber’s advice |
Patient Role in Managing Risks
Patients can actively engage in their healthcare when a relative contraindication is identified.
Steps patients can take include:
- Understanding the Risks and Benefits: Ask the healthcare provider why the medication is being prescribed and what precautions to follow.
- Sharing Relevant Health Information: Be honest about medical history, current conditions, and any other medications being used.
- Reporting Side Effects Promptly: Notify a doctor or pharmacist if worrying symptoms develop.
- Attending Regular Follow-Ups: These visits help assess whether the medication is working and whether the risks are being properly managed.
Training and Guidelines for Healthcare Professionals
Healthcare professionals follow evidence-based guidelines and training to manage relative contraindications effectively. Prescribers and pharmacists use professional prescribing references. If you are unsure about a medicine, ask the prescriber or pharmacist and read the patient information leaflet. The public can find information at NHS medicines A to Z.
Training includes:
- Case-Based Learning: Practical examples teach doctors how to manage relative contraindications.
- Specialty Updates: Staying informed about the latest research ensures better decision-making.
- Simulation Exercises: Simulated situations help new healthcare professionals prepare for real-life scenarios.
Final Thoughts
Relative contraindications provide flexibility and allow healthcare teams to make thoughtful, patient-centred decisions. By carefully weighing risks against potential benefits and putting safeguards in place, patients can still receive the treatment they need, even when certain conditions pose a risk.
Both healthcare professionals and patients have roles to play in ensuring safe use of relatively contraindicated medications, with ongoing communication and monitoring being key to positive outcomes.