Theophylline Toxicity Threshold Assessment

Assess theophylline toxicity risk and predict seizure/cardiac arrhythmia threshold based on serum level, rate of level rise (acute vs chronic), patient age, and comorbidities.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Assess theophylline toxicity risk and predict seizure/cardiac arrhythmia threshold based on serum level, rate of level rise (acute vs chronic), patient age, and comorbidities

Each component has a specific meaning:

  • Serum level — The serum level recorded for the scenario being assessed.
  • Rate of level rise — The rate of level rise recorded for the scenario being assessed.
  • Patient age — The patient age recorded for the scenario being assessed.
  • Comorbidities — The comorbidities recorded for the scenario being assessed.

Note: Interpret the theophylline toxicity result against the thresholds and context described above.

How to Use

Enter the serum level, rate of level rise, patient age, comorbidities for the scenario you are assessing. Assess theophylline toxicity risk and predict seizure/cardiac arrhythmia threshold based on serum level, rate of level rise (acute vs chronic), patient age, and comorbidities. Use the theophylline toxicity result to inform your calculation.

Frequently Asked Questions