Basic Uniphyllin Information

• INN (International Nonproprietary Name): theophylline.
• Brand Names Available In United Kingdom: Theo-24®, Elixophyllin®, Theo-Dur®, Afonilum SR, Slo-Phyllin, Theolair.
• ATC Code: R03DA04.
• Forms & Dosages: Extended-release capsules 100 mg, 200 mg, 300 mg and 400 mg; extended-release tablets (strengths vary by brand); oral solution for paediatric use (strength varies).
• Manufacturers In United Kingdom: Europe suppliers include Sanofi and Teva as generic variants and global suppliers such as Sandoz (local UK licencees and wholesalers supply branded and generic product lines).
• Registration Status In United Kingdom: Registered as prescription medicines; product licences vary by brand and national marketing authorisation.
• OTC / Rx Classification: Prescription-only medicine (POM) in major markets.

Critical Warnings & Restrictions

High-Risk Groups

Theophylline has absolute contraindications for people with a known hypersensitivity to theophylline or other xanthines such as caffeine or aminophylline.

Patients with uncontrolled cardiac arrhythmias should not take theophylline.

Active peptic ulcer disease is an absolute contraindication to theophylline use.

High-risk groups include elderly patients, those with severe liver disease, congestive heart failure, seizure disorders and hyperthyroidism.

Pregnancy requires specialist input and should only proceed if the clinician judges benefits outweigh risks.

For elderly patients start at a lower dose and monitor serum theophylline levels closely because clearance is often reduced with age.

Checklist For Prescribers And Pharmacists:

• Confirm absence of hypersensitivity to xanthines.
• Review cardiac history and current ECG if arrhythmia risk exists.
• Check for active peptic ulcer disease before prescribing.
• Assess liver and renal function and plan for dose reduction if impairment is present.
• Document pregnancy status and obtain specialist advice where relevant.
• Plan for baseline and follow-up plasma theophylline monitoring.

Interaction With Activities

Theophylline can cause tremor, insomnia and agitation which may impair driving or operating machinery.

Rarely, high levels or toxicity can lead to seizures which are incompatible with safe driving.

Advise patients not to drive or work with high-risk machinery until they know how theophylline affects them.

Record counselling about fitness to drive in the patient record and provide written advice to support discussions with the DVLA or an employer if required.

Q&A — Can I Drive After Taking It In The UK?

Short Answer: Not until you know how it affects you.

If you experience dizziness, tremor, significant insomnia or any seizure-like activity do not drive and tell the DVLA or your insurer if required.

If in doubt contact your prescriber or pharmacist for tailored advice.

Usage Basics

INN, Brand Names Available In The UK

INN: theophylline is the International Nonproprietary Name used across clinical notes and prescriptions.

• Theo-24® — extended-release capsules commonly referenced in formularies.
• Elixophyllin® and Theo-Dur® — alternative branded formulations.
• Regional brands such as Afonilum SR, Slo-Phyllin and Theolair may appear in supply chains.

INN vs Brand

The INN identifies the active substance (theophylline) while brand names (for example Theo-24®) refer to a specific manufacturer’s product or formulation.

Legal Classification

Theophylline preparations are prescription-only medicines in major markets, including the UK.

Prescriptions are supplied via NHS or private prescribers and dispensed through POM channels.

• MHRA oversees marketing authorisations and safety communications for theophylline products.
• Encourage Yellow Card reporting for suspected adverse drug reactions.

Dosing Guide

Standard Regimens

Typical adult initiation with an extended-release formulation is 300–400 mg once daily for maintenance therapy in asthma, chronic bronchitis or emphysema.

For patients aged 12–15 years the recommended maximum without serum monitoring is 16 mg/kg, up to 400 mg per day.

For those aged 16 years and above the maximum dose without serum monitoring is typically 400 mg per day.

Plasma theophylline levels should guide dose optimisation and safety, particularly when titrating or in the presence of interacting drugs.

Adjustments For Comorbidities

Children: many sustained-release products such as Theo-24 are not recommended in children, so paediatric dosing requires specialist input and mg/kg calculation.

Elderly: start at a lower dose (for example around 300 mg/day) and increase slowly only after checking serum levels.

Liver or kidney impairment: reduce doses substantially and monitor serum theophylline frequently because clearance is reduced.

• Checklist Before Dose Change: current serum level, recent interacting medicines, smoking status, liver function tests.
• Arrange prompt follow-up bloods 3–5 days after a dose change for ER formulations to reach steady state.

Q&A — What If I Miss A Dose?

Take the missed dose as soon as you remember unless it is close to the next scheduled dose.

Do not double the next dose to make up for a missed one.

If uncertain, contact your pharmacist or prescriber for personalised advice.

Interaction Chart

Food And Drinks

Theophylline is a methylxanthine related to caffeine and combined stimulant effects can increase side effects such as tremor and insomnia.

Avoid high‑caffeine beverages close to dosing and discuss individual caffeine tolerance with a pharmacist.

Take theophylline on an empty stomach — one hour before or two hours after a meal — to reduce variability in absorption.

Avoid taking within one hour of a fatty meal if you are on a higher theophylline dose as fatty meals can affect release characteristics for some formulations.

Smoking induces hepatic enzymes and increases theophylline clearance, so patients must notify prescribers if smoking habits change.

• Practical Tip: If a patient stops smoking, expect theophylline levels to rise and check plasma concentrations sooner.

Common Drug Conflicts

Theophylline is primarily metabolised by CYP1A2 and many drugs alter its clearance.

• Checklist For Interaction Review: current medicines, recent antibiotics, anticonvulsant status, herbal products (for example St John’s wort), smoking and caffeine intake.
• Report suspected interactions or adverse reactions via Yellow Card to support real-world safety monitoring.

User Reports & Trends

What Patients Say: Theophylline is often described as effective for maintenance when inhalers are not suitable or in certain COPD care pathways.

• Pros Reported: oral dosing convenience, once‑daily extended‑release options, usefulness where inhaler technique is poor.
• Cons Reported: nausea, tremor, insomnia, need for regular blood tests and frequent drug interactions.

Sentiment Scale: Mixed — many patients prefer inhaled therapy, while a minority value theophylline for long-term oral maintenance when inhalers are impractical.

ER / SR / MR Definitions

ER (Extended Release), SR (Slow Release) and MR (Modified Release) all describe formulations that release theophylline slowly to allow once-daily dosing and improved adherence.

Extended-release options such as 100–400 mg strengths in bottles or blisters help reduce dosing frequency and the burden of multiple daily doses.

Practical Suggestion: Consider adding a short patient survey or a quotes box from consenting patients to capture local experience for future content.

Access & Purchase Options

Boots, LloydsPharmacy, Superdrug

Community pharmacies and major chains dispense prescribed theophylline and provide pharmacist counselling at point of sale.

• In-Store Services: prescription dispensing, medication review, advice on administration and monitoring arrangements.
• Stock: branded and generic supplies may be available; some brands require special order from wholesalers.

Online Pharmacies And NHS E-Prescriptions

NHS Electronic Repeat Dispensing and e-prescriptions allow collection at a nominated pharmacy or home delivery via registered online pharmacies.

• Checklist For Safe Online Supply: valid prescription, GPhC-registered provider, in-pharmacy counselling available on request.

Note On Prescription Charges: England usually applies the standard NHS prescription charge unless the patient is exempt, while Scotland, Wales and Northern Ireland have different prescription funding arrangements — confirm current NHS guidance for regional differences.

In our online pharmacy, uniphyllin is available without a prescription, with discreet delivery to United Kingdom in 5-14 days.

Mechanism & Pharmacology

Simplified Explanation

Theophylline is a methylxanthine bronchodilator classified under ATC R03DA04 used for maintenance therapy in obstructive airway disease.

It acts by non-selective phosphodiesterase inhibition, antagonism at adenosine receptors and modulation of intracellular calcium, leading to relaxation of airway smooth muscle and modest anti-inflammatory effects.

Because theophylline has a narrow therapeutic index, plasma monitoring is necessary to balance effect and safety.

Clinical Terms

Therapeutic Range

The plasma concentration window where efficacy is expected and toxicity is minimised; monitoring ensures levels remain in range.

Steady State

The point at which drug intake and elimination balance and plasma concentrations stabilise after repeated dosing.

CYP1A2 Metabolism

The primary hepatic enzyme pathway responsible for theophylline clearance and a major source of drug–drug interactions.

Extended-Release Vs Immediate-Release

Extended-release formulations release drug slowly to permit once-daily dosing and reduce peak-trough fluctuations compared with immediate‑release products.

Indications & Off-Label Uses

MHRA-Approved Uses

Theophylline extended-release formulations are approved for maintenance therapy in asthma and chronic obstructive airway disease, including chronic bronchitis and emphysema.

It is not suitable as a rescue medication for acute bronchospasm.

Off-Label Practices In NHS And Private Care

• Selected use in nocturnal asthma when inhaled therapy is unsuitable or ineffective with specialist oversight.
• Use in complex COPD management where inhaled devices are impractical or adherence is poor.
• Paediatric use may occur off-label under specialist supervision, noting many SR products are not recommended for children.

Protocol Checklist For Off-Label Prescribing:

• Document indication and rationale clearly in clinical notes.
• Obtain and record informed consent discussing monitoring burden and potential risks.
• Arrange baseline ECG and liver function tests if arrhythmia or hepatic impairment is a concern.
• Plan serum theophylline monitoring schedule and review intervals.

Key Clinical Findings

Recent guideline updates between 2022 and 2025 place theophylline below inhaled corticosteroids and long-acting bronchodilators for first-line maintenance due to its narrow safety margin and monitoring requirements.

Evidence supports modest bronchodilator benefit in selected patients and potential cost-effectiveness where inhaler use is impractical.

• Before prescribing, check the latest BTS, SIGN or NICE guidance and document alignment with local formularies.
• Consider real-world evidence and RCT data when deciding on long-term theophylline therapy.

Alternatives Matrix

NHS Prescribing Alternatives

Pros And Cons Checklist

• Pros: Once-daily ER oral options, potential affordability and usefulness where inhaler therapy is impractical.
• Cons: Narrow therapeutic index, requirement for plasma monitoring, frequent drug interactions and systemic side effects.

Common Questions

• Is Theophylline Safe In Pregnancy? Use only if clearly needed after discussion with an obstetrician and prescriber, with monitoring recommended.
• Can Children Take It? Many SR products such as Theo-24 are not recommended in children; paediatric use should be specialist-led.
• Will I Need Blood Tests? Yes; plasma theophylline levels are used to guide dosing and avoid toxicity.
• Can I Drink Coffee? Limit caffeine intake to reduce additive stimulant side effects and discuss limits with your pharmacist.

NHS Cost & Access Comparison

• Regional Differences: Patients in England usually pay the NHS prescription charge unless exempt; Scotland, Wales and Northern Ireland have separate prescription arrangements — check the relevant NHS page for current rules.

Registration & Regulation

MHRA Approval Process

Theophylline products are regulated as POMs and the MHRA oversees licensing, product variations and safety communications.

Check the specific product licence and Summary of Product Characteristics (SPC) before prescribing.

Suspected adverse drug reactions should be reported via the Yellow Card scheme to support pharmacovigilance.

NHS Prescribing Framework

Prescribing should follow evidence-based guidance from NICE, BTS or SIGN with documented rationale for theophylline use and consent for monitoring.

• Prescriber Checklist: confirm indication, obtain baseline LFTs, consider baseline ECG if arrhythmia risk, agree monitoring intervals for serum theophylline.

Short Flowchart Suggestion: Indication confirmed → Baseline tests and consent → Initiate low ER dose → Check serum at steady state → Adjust dose and document plan.

Storage & Handling

UK Household Storage

Store theophylline at room temperature between 15–30°C and protect from moisture and heat.

Avoid storing in bathrooms or windowsills in damp UK homes; use a dry, enclosed cupboard instead.

Keep medicines in original packaging and ensure bottles are tightly closed.

Checklist For Travel And Transfers: carry in original container with prescriber details and current prescription; store in a cool dry place while travelling.

Guidance From NHS And Pharmacists

• Do not crush or chew extended-release capsules or tablets.
• Advise patients to check expiry dates and return unused medicines to a pharmacy for safe disposal.
• Pharmacists should counsel on storage and handling at the point of supply.

Guidelines For Proper Use

UK Pharmacist Counselling Style

Key Counselling Points: state the INN (theophylline) and brand, explain the indication and confirm the dose and timing.

Advise to take on an empty stomach and never to crush or chew ER formulations.

Explain expected side effects and red flags requiring urgent care such as persistent vomiting, palpitations or seizures.

Stress the need for blood tests to check plasma theophylline levels and review interacting medicines at each consultation.

Pharmacist Script Template: “This is theophylline, an extended‑release bronchodilator taken once daily on an empty stomach. Do not crush the tablets. We will need blood tests to check levels. Tell me about all other medicines and any changes in smoking or caffeine.”

NHS Patient Safety Advice

• Carry an up-to-date medicines list and inform all prescribers about theophylline treatment.
• Notify prescribers of any new medicines, changes to smoking habits, or pregnancy.
• Do not stop medication abruptly without clinical advice.

Patient Handout Suggestion: include dosing times, monitoring schedule, a brief interaction checklist and Yellow Card reporting link.

Delivery Across United Kingdom

Final Notes

Theophylline remains a useful oral maintenance option in selected patients where inhaled therapy is unsuitable, but it requires careful monitoring due to interactions and a narrow therapeutic index.

Always check individual product licences and the Summary of Product Characteristics before prescribing or dispensing.

For personalised advice speak with a pharmacist or specialist clinician and ensure monitoring arrangements are in place.