Basic Uniphyllin Information

• INN (International Nonproprietary Name): theophylline
• Brand Names Available In United Kingdom: Theo-24®, Theo-Dur®, Afonilum SR, Slo-Phyllin, Theolair; availability by brand varies by supplier and region and is not specified for every product in the UK.
• ATC Code: R03DA04 — Respiratory System; Drugs For Obstructive Airway Diseases; Xanthines, Plain.
• Forms & Dosages: Extended-release capsules 100 mg, 200 mg, 300 mg, 400 mg in bottles (commonly 100 or 500 capsules); extended-release tablets in variable strengths by brand; oral liquid formulations for paediatric use (strengths vary).
• Manufacturers In United Kingdom: Not specified — European suppliers include Sanofi and Teva; global suppliers include Sandoz and other local licensees.
• Registration Status In United Kingdom: Registered as prescription-only; formulations and brand names vary by country within Europe and the UK.
• OTC / Rx Classification: Prescription only (Rx) in major markets including the UK.

Key Findings From Recent Trials

Which recent studies changed clinical thinking about theophylline?

Major 2022–2025 Studies

Recent clinical research up to mid‑2024 concentrated on low‑dose theophylline as an adjunct anti‑inflammatory in COPD and on pharmacokinetic profiling of extended‑release preparations.

Randomised trials and pooled analyses reported small but statistically significant improvements in exacerbation frequency and morning symptoms when low therapeutic plasma concentrations (5–10 mg/L) were achieved alongside inhaled therapy.

Pharmacokinetic studies emphasised wide interpatient variability in absorption and clearance, supporting therapeutic drug monitoring (TDM) for adults, especially the elderly and those with hepatic impairment.

Main Outcomes

Effect sizes were modest versus standard inhaled therapy.

Benefits were most consistent in patients with poor access to inhaled devices or adherence problems.

Extended‑release (ER) formulations in strengths analogous to Theo‑24 (100–400 mg) maintained steadier plasma levels than immediate‑release forms.

Safety Observations

Adverse events rose when plasma concentrations exceeded 15–20 mg/L.

Older adults and those on multiple medicines had a higher risk of toxicity.

Regulators continue to stress prescription‑only status and the need for monitoring with chronic use.

Clinical Mechanism Of Action

How does theophylline actually help breathing and inflammation?

Layman’s Explanation

Theophylline is a methylxanthine bronchodilator that relaxes airway muscles and may dampen inflammatory cell signalling.

It eases breathing and reduces symptoms over time rather than acting as a fast‑acting rescue inhaler.

Scientific Breakdown

At molecular level theophylline acts through several mechanisms.

PDE Inhibition And cAMP

Theophylline inhibits phosphodiesterase (PDE) isoenzymes, which increases intracellular cyclic AMP and promotes bronchial smooth muscle relaxation.

Adenosine Receptor Antagonism

The drug blocks adenosine receptors, reducing bronchoconstriction and downstream mediators of inflammation.

Histone Deacetylase (HDAC) Modulation (Low‑Dose)

At low concentrations theophylline may enhance corticosteroid responsiveness via HDAC activation, which is the rationale for adjunct use in steroid‑resistant COPD cohorts.

Note: Mechanistic claims align with standard pharmacology summaries for theophylline.

Scope Of Approved And Off-Label Use

Who is prescribed theophylline and when is it used off‑label?

United Kingdom Approvals

In the UK theophylline (INN: theophylline) is prescription only and formulations vary regionally.

NICE and MHRA place it behind inhaled corticosteroids and long‑acting bronchodilators for routine asthma and COPD management.

Extended‑release preparations similar to Theo‑24 strengths (100–400 mg) are used for maintenance when inhaled therapy is unsuitable or unavailable.

Notable Off‑Label Trends

Clinicians sometimes use low‑dose theophylline off‑label as a steroid‑sparing anti‑inflammatory in COPD or for nocturnal asthma symptom control.

Paediatric use is limited; Theo‑24 SR is not recommended for children and any paediatric theophylline requires specialist mg/kg dosing and TDM.

Dosage Strategy

What is the usual adult start dose and how should it be adjusted?

General Dosing

Typical adult initiation for extended‑release theophylline in maintenance respiratory disease is 300–400 mg once daily (ER).

The maximum daily dose without serum level monitoring is 400 mg for patients aged 16 years and above.

Adolescents aged 12–15 years may use up to 16 mg/kg (maximum 400 mg/day).

Elderly patients and those with hepatic or renal impairment should start lower with slow titration and closer monitoring.

Condition‑Specific Dosing

For asthma and COPD maintenance, start at 300 mg/day ER and adjust according to clinical response and serum theophylline levels.

Theo‑24 SR is not recommended for children; alternative formulations use specialist mg/kg regimens with TDM.

In acute settings theophylline is not a rescue inhaler; immediate‑release aminophylline may be used intravenously in hospital under protocol.

Safety Protocols

What should prescribers and patients watch for to stay safe?

Contraindications

Absolute contraindications include hypersensitivity to theophylline or other xanthines such as caffeine, uncontrolled arrhythmias, and active peptic ulcer disease.

Relative contraindications include severe liver disease, congestive heart failure, hyperthyroidism and seizure disorders.

Adverse Effects

Common side effects are nausea, vomiting, diarrhoea, headache, restlessness, insomnia, tremor and sweating.

Serious dose‑related effects include tachyarrhythmias, seizures, severe vomiting and electrolyte disturbances.

Risk of toxicity increases with plasma concentrations above 15–20 mg/L and in elderly patients or those on multiple medicines.

Emphasise serum measurement, avoid abrupt discontinuation and educate patients on overdose signs that need emergency care.

Interaction Mapping

Which foods and medicines change theophylline levels?

Food Interactions

Take theophylline on an empty stomach — one hour before or two hours after meals.

Avoid taking it within one hour of fatty meals at high doses.

Caffeine potentiates stimulant effects and may worsen insomnia, tremor or palpitations.

Drug Combinations To Avoid

Theophylline is mainly metabolised by CYP1A2.

Strong CYP1A2 inhibitors such as ciprofloxacin and some macrolide antibiotics increase theophylline levels and risk toxicity.

Inducers such as rifampicin, carbamazepine and phenytoin reduce plasma concentrations and may render theophylline ineffective.

Always review concomitant medicines and use TDM to guide dose adjustments.

Patient Experience Analysis

What do people say about once‑daily ER theophylline in real life?

Survey Data

Real‑world surveys show patients on ER theophylline report modest symptom relief with once‑daily dosing.

Adherence is often better with ER options in strengths 100–400 mg supplied in bottles.

Common complaints are insomnia and tremor, and patients value regular blood‑level monitoring by clinicians.

Forum Trends

Online forums reveal mixed sentiment: users appreciate reduced breathlessness when inhaler therapy is suboptimal.

Discussion points commonly include interaction worries, the burden of regular blood tests and dietary cautions.

Patient education on toxicity signs and the fact that theophylline is not for acute relief is a repeated theme.

Distribution And Pricing Landscape

How easy is it to find uniphyllin and what does it cost in the UK?

In the UK theophylline products are prescription only and sold as branded or generic extended‑release tablets and capsules.

Common market names include Theo‑24, Theo‑Dur and regional brands; generics dominate NHS formularies and are typically lower cost.

Packaging may be bottles or blister strips depending on brand and local regulation; ER strengths commonly span 100–400 mg.

Supply chain notes: store at 15–30°C and protect from moisture.

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

Alternative Options

What are the alternatives if theophylline is unsuitable?

Comparison Table (Narrative)

Alternatives include other methylxanthines such as aminophylline and dyphylline, and preferred inhaled therapies — inhaled corticosteroids, long‑acting beta‑agonists (LABA) and long‑acting muscarinic antagonists (LAMA).

Inhalers usually provide faster symptom control and have better safety profiles than oral methylxanthines.

Pros And Cons

Pros of theophylline are oral dosing, low cost and once‑daily ER options that aid adherence, with possible anti‑inflammatory effects at low doses.

Cons are a narrow therapeutic index, frequent CYP1A2 interactions, the need for serum monitoring and notable side effects; it is not a rescue medication.

Choice depends on patient capability, access to inhaler devices, comorbidities and the capacity for monitoring.

Regulatory Status

How is theophylline classified and what should UK prescribers know?

Licensing And Classification

Theophylline (INN: theophylline) is prescription‑only across major markets.

Theo‑24® is FDA‑approved in the US; in the EU and UK formulations and brand names vary and remain prescription only.

The WHO lists generic theophylline on its Essential Medicines list.

UK Specifics

MHRA and NHS advise prescription use with appropriate monitoring.

Prescribers should follow national guidance that generally places theophylline behind inhaled controller therapies.

Consolidated FAQ

What are the quick answers patients and prescribers need?

Practical Q&A

Q: Is theophylline a rescue inhaler?

A: No — oral ER theophylline is for maintenance, not acute relief.

Q: Do I need blood tests?

A: Yes — serum levels guide dosing and safety, particularly in the elderly or those with liver disease.

Q: Can I drink coffee?

A: Limit caffeine to reduce additive stimulant effects.

Q: What if I miss a dose?

A: Take as soon as remembered unless it is near the next dose; do not double up.

Prescriber Considerations

Check for CYP1A2 interactions, start lower in the elderly, avoid Theo‑24 SR in children and advise patients to take on an empty stomach and not to crush ER formulations.

Overdose signs such as vomiting, agitation, arrhythmia or seizures require immediate emergency care.

Visual Guide

What should a patient infographic include to make theophylline easy to understand?

Suggested Infographic Elements

Show ER capsule and tablet images and common strengths (100, 200, 300, 400 mg).

Include a dosing timeline emphasising once‑daily ER administration and blood‑test timing (baseline and after changes).

Highlight contraindications, common side effects and interaction icons for ciprofloxacin, rifampicin and caffeine.

Layout Priorities

Top row: what it is (INN: theophylline) and who it’s for.

Middle row: how to take (empty stomach; do not crush).

Bottom row: when to seek help (overdose signs) with clear TDM callouts and NHS‑style colours for familiarity.

Storage And Transport

How should uniphyllin be stored at home and handled in the supply chain?

Best Practices

Store ER capsules and tablets at room temperature (15–30°C) and protect from moisture and heat.

Keep the medicine in its original packaging and ensure bottles are tightly closed to maintain stability.

Check liquid formulations for any refrigeration instructions; many are stored at room temperature.

Supply Chain Notes

Pharmacies and distributors should monitor for batch recalls and expiry dates and avoid temperature excursions during transport.

Advise patients not to transfer tablets into unsealed containers to preserve labelling and stability.

Guidelines For Proper Use

What should prescribers tick off and what should patients remember?

Prescriber Checklist

Confirm the indication for maintenance asthma or COPD and review all medicines for CYP1A2 interactions.

Start conservatively in the elderly or those with liver disease and arrange baseline and follow‑up plasma theophylline levels.

Counsel patients to take the tablets on an empty stomach and not to crush ER forms.

Patient Guidance

Explain that theophylline is not for acute attacks, counsel on signs of toxicity and the need for blood tests, advise caffeine reduction and give missed‑dose instructions.

Stress that abrupt discontinuation can worsen respiratory control and that the medicine is prescription only.

Monitoring Schedule (Practical)

Obtain a baseline level within 3–5 days after reaching steady state following initiation or dose change.

Repeat levels after starting or stopping interacting medicines and check more frequently during febrile illness or organ dysfunction.

Delivery Across United Kingdom