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Also reported in: mg/L
Your theophylline level is within the target therapeutic range, providing effective bronchodilation for asthma or COPD. At these levels, the drug also has anti-inflammatory effects and improves diaphragmatic function.
Your theophylline level is far below the therapeutic range, providing virtually no bronchodilator benefit for asthma or COPD. There is minimal effect on airway relaxation or respiratory drive.
Contact your doctor. A significant dose increase is needed. Theophylline has a narrow therapeutic index, so dose adjustments should be made cautiously with repeat level monitoring.
Theophylline: {{value}} {{unit}} — critically low (therapeutic: {{low}}–{{high}})Your theophylline level is below the target range. At these levels, the bronchodilator effect is suboptimal. Theophylline metabolism is affected by many factors including smoking (increases clearance), liver disease (decreases clearance), and drug interactions.
Discuss with your doctor. A dose increase may be needed. If you smoke or have recently quit, your theophylline dose may need significant adjustment.
Theophylline: {{value}} {{unit}} — subtherapeutic (target: {{low}}–{{high}})Your theophylline level is at or just below the target range. For mild asthma or COPD, lower levels may provide some benefit. The lower therapeutic limit (5 µg/mL) is where bronchodilation begins.
Discuss with your doctor. If you have adequate symptom control, this level may be acceptable. If symptoms persist, a dose increase is indicated.
Theophylline: {{value}} {{unit}} — borderline lowYour theophylline level is within the target therapeutic range, providing effective bronchodilation for asthma or COPD. At these levels, the drug also has anti-inflammatory effects and improves diaphragmatic function.
Continue current dosing. Monitor theophylline levels periodically, especially if smoking status changes, new medications are added, or if liver function changes.
Theophylline: {{value}} {{unit}} — within therapeutic range ({{low}}–{{high}})Your theophylline level sits in the optimal therapeutic window (8–12 µg/mL), providing excellent bronchodilation with minimal side effects.
Continue current regimen with routine monitoring.
Theophylline: {{value}} {{unit}} — at optimal levelYour theophylline level is above the target range. At levels above 15 µg/mL, side effects become more common — nausea, vomiting, insomnia, nervousness, and tremors. Levels approaching 20 µg/mL are considered toxic.
Discuss with your doctor. A dose reduction may be needed. Identify any new factors that may have increased the level (new medications, liver issues, reduced smoking).
Theophylline: {{value}} {{unit}} — borderline highYour theophylline level is above the therapeutic range and into the toxic range. Symptoms include persistent nausea and vomiting, noticeable headache, insomnia, tremor, and tachycardia. At higher levels, cardiac arrhythmias and seizures can occur without warning.
Contact your doctor or seek medical attention. Hold the next dose. Check for factors causing the elevation (drug interactions, hepatic impairment). Monitor heart rate and ECG. noticeable toxicity may require activated charcoal or hemodialysis.
Theophylline: {{value}} {{unit}} — supratherapeutic (target: {{low}}–{{high}})A critically high theophylline level represents noticeable toxicity. This is a medical emergency with high risk of life-threatening cardiac arrhythmias (ventricular tachycardia, fibrillation), seizures (often refractory to treatment), hypotension, and metabolic disturbances (low potassium, hyperglycemia, metabolic acidosis).
This is a medical emergency. Call emergency services immediately. IV activated charcoal (for acute ingestion) and hemodialysis for noticeable toxicity are the mainstays of treatment. ICU admission with continuous cardiac monitoring is essential.
Theophylline: {{value}} {{unit}} — critically high (target: {{low}}–{{high}})Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.