OEUK medication assessment considers both the medicine being taken and the medical condition for which it is prescribed. Taking prescription or over-the-counter medication does not automatically prevent offshore work. During an OEUK medical, the examining doctor considers both the condition being treated and whether the medication itself could affect safety offshore.
Written and medically reviewed by Dr Farah MacDonald | Occupational Health Physician & OEUK Registered Doctor | Updated September 2026
Many medications are compatible with offshore work, but some require closer assessment because of their potential effects on alertness, coordination, blood pressure, blood glucose, bleeding risk or other safety-critical functions.
OEUK advises offshore workers to declare prescribed and over-the-counter medication and notes that some medicines require prior review before offshore mobilisation.
No. Taking medication does not automatically make somebody medically unfit for offshore work.
Many offshore workers take regular medication for conditions such as high blood pressure, asthma, diabetes, allergies or other long-term health problems.
The examining doctor considers:
Stable treatment that is well tolerated may be entirely compatible with offshore work.
Read our OEUK Medical Standards 2026 guide
Offshore work takes place in a remote environment where access to hospital treatment may be delayed and where workers may need to perform safety-critical duties or respond during an emergency.
Some medicines can affect:
The doctor therefore assesses the potential occupational effects of the medication as well as the health condition for which it was prescribed.
OEUK’s registered Medical Examiners are expected to follow a risk-based approach when assessing fitness for offshore work.
Declare all regular prescription medication and any significant over-the-counter treatment you use.
This includes medication that you take:
It is better to provide an accurate medication history than to leave the examining doctor without information needed to make a safe fitness decision.
OEUK also advises workers to notify their employing company or occupational-health department about medication so that suitability can be assessed before mobilisation where required.
Often, yes.
Prescription medication is considered according to the reason it is needed, the worker’s clinical stability and any potential occupational side effects.
The fact that a medication has been prescribed does not itself determine offshore fitness.
Where treatment is stable and well tolerated, certification may be straightforward. Where medication has recently started, changed significantly or is associated with potentially important side effects, additional assessment may be required.
Over-the-counter medication can also affect offshore safety.
Some antihistamines, painkillers, cold remedies and sleep preparations can cause drowsiness, dizziness or impaired concentration.
Do not assume that a medicine is automatically suitable for safety-critical work simply because it can be bought without a prescription.
If you regularly use an over-the-counter medicine, tell the examining doctor what you take and how often you use it.
Medication that causes drowsiness or reduced alertness requires particular consideration offshore.
This may be relevant where work involves:
The clinical decision depends on the medicine, dose, timing, individual response and the duties being undertaken.
Do not stop sedating medication suddenly unless advised by the clinician responsible for your treatment.
Medication used to treat high blood pressure is commonly compatible with offshore work when treatment is stable, effective and well tolerated.
The examining doctor may consider whether treatment causes dizziness, faintness, symptomatic low blood pressure or another effect that could affect safe performance.
If your blood-pressure treatment has recently changed, bring recent readings where available.
Read: Blood Pressure and Your OEUK Medical
Diabetes medication is considered alongside the stability of the worker’s diabetes and the risk of hypoglycaemia.
Particular attention may be required where treatment can cause low blood glucose, because significant hypoglycaemia could impair judgement, coordination or consciousness offshore.
The assessment may consider:
Bring relevant diabetic review information or recent results where available.
Anticoagulant and antiplatelet medication does not automatically prevent offshore work.
However, the doctor may need to consider:
Recent specialist information may be useful where anticoagulation follows a significant cardiovascular event or other major illness.
Medication prescribed for anxiety, depression or another mental-health condition is assessed individually.
The fact that somebody takes an antidepressant or other psychiatric medication does not itself determine offshore fitness.
The doctor considers both the underlying condition and possible treatment effects such as:
Stability of the condition and treatment is usually more important than the simple fact that medication is being taken.
A new medication or recent dose change may require additional consideration because the worker may not yet know how well the treatment works or whether side effects will occur.
This does not automatically mean that certification cannot be issued.
Depending on the medication and condition, the examining doctor may need evidence that treatment is stable and well tolerated before making a final fitness decision.
If you take regular medication, bring:
A photograph or printout of your repeat prescription can also be useful if you do not have a current medication list.
Many prescribed medicines can be taken offshore, but workers should follow their employer’s and operator’s medication declaration and carriage procedures.
OEUK industry guidance requires prescribed and over-the-counter medication to be declared where applicable, and offshore travel guidance states that medication should be appropriately labelled and carried in its original or pharmacy-dispensed packaging.
Take an adequate supply for the planned offshore trip and any reasonable contingency required by your employer or operator arrangements.
Do not carry medication prescribed for another person.
Sometimes the examining doctor cannot determine the suitability of a medication without further information about the underlying medical condition.
Additional evidence may include:
A request for further information does not automatically mean that you are medically unfit. It means that sufficient evidence is required to make an appropriate risk-based decision.
OEUK’s current Issue 8.2 Medical Guidelines provide the medical-fitness framework used by registered Medical Examiners.
No. Many prescription medicines are compatible with offshore work. The doctor considers the condition being treated, treatment stability and possible occupational side effects.
Relevant over-the-counter medication should also be disclosed, particularly where it is used regularly or may cause drowsiness, dizziness or another effect that could affect safe work.
Potentially, yes. Fitness depends on the underlying condition, stability of treatment, symptoms, side effects and occupational duties rather than simply the name of the medication.
Usually, yes, provided the underlying hypertension is appropriately controlled and the medication is effective and well tolerated.
Sedating medication requires careful assessment because impaired alertness can be particularly important in shift work and safety-critical duties. The medication, dose, timing and individual response all need consideration.
No. Do not stop prescribed medication simply to try to obtain a medical certificate. Continue treatment unless the clinician responsible for your care has advised otherwise.
Bring a repeat-prescription list, medication box, pharmacy record or another reliable record showing the medication name and dose.
Marina Medicals provides doctor-led OEUK medicals in Cardiff for offshore workers across South Wales and the wider UK energy sector.
If you take regular medication and are unsure whether additional information may be needed, bring an accurate medication list and any relevant recent medical correspondence to your appointment.
