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| | Bioline International Official Site (site up-dated regularly) |
 | | The finding is of special significance since substitution of one brand of theophylline, a drug with a narrow therapeutic index, with another brand may result in sub-therapeutic response in patients. |
 | | Theophylline being a narrow therapeutic index drug, it is legally incumbent on the manufacturers to ensure the quality of the marketed formulations, since a small change in the systemic concentrations may lead to a marked change in the pharmacodynamic response, with undesirable therapeutic consequences. |
 | | Thus, asthmatic patients whose therapeutic response to theophylline, in approved doses, is sub-optimal may not necessarily be drug-resistant. |
| www.bioline.org.br /request?ph04008 (2600 words) |
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