All tests · Therapeutic Drug Levels
Therapeutic Drug Levels
Normal range 10-20 µg/mL (56-111 µmol/L SI). Specimen: Serum.
Also known as: aminophylline level.
Combined adult band. LabVals does not publish separate men's, women's, or pediatric ranges for Theophylline Level; those can be narrower than the band shown.
| Specimen | Serum |
|---|---|
| Conventional range | 10-20 µg/mL |
| SI range | 56-111 µmol/L |
| Conversion factor | ×5.55 (conventional → SI) |
| Toxicity threshold | > 20 µg/mL (nausea, tachycardia, seizures) |
| Panel | Therapeutic Drug Levels |
Convert any Theophylline Level result between units on the unit converter.
The standard teaching reference range for Theophylline Level is 10-20 µg/mL in conventional units, or 56-111 µmol/L in SI units. This value is measured in serum.
For Theophylline Level, the commonly taught toxicity threshold is: > 20 µg/mL (nausea, tachycardia, seizures).
Source: Adult reference values compiled from Pagana & Pagana, Mosby's Diagnostic and Laboratory Test Reference, and Fischbach & Dunning, A Manual of Laboratory and Diagnostic Tests. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
Above the range
Below the range
At the bedside
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