Abstract
Primary health care providers play a critical role in maintaining public health, and the appropriate use of pharmaceutical products is one of the major parts of their practice. This series of articles, entitled ‘Clinical Pharmacology Review for Primary Health Care Providers,' is intended to help primary health care providers select more appropriate prescriptions for frequently used drugs based on up-to-date information. We expect that this effort will contribute to improvements in public health and diminish unnecessary drug use.
References
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Table 1.
Generation | Drug | Onset of action (h) | tmax (h) | Half-life (h) | Duration of action (h) | Drug interaction | Dose adjustment |
---|---|---|---|---|---|---|---|
1 | Chlorpheniramine | 0.5 – 3 | 2 – 3.6 | 20 – 36 | 24 | Possible | NA |
Clemastine | 2 | NA | 10 – 12 | NA | Possible | NA | |
Diphenhydramine | 2 | 0.7 – 2.7 | 7 – 11 | 12 | Possible | H | |
Hydroxyzine | 2 | 1.7 – 2.5 | 16 – 24 | 24 | Possible | H | |
2 | Cetirizine | 1 – 3 | 0.5 – 1.5 | 7 – 10 | ≥ 24 | Unlikely | H, R |
Desloratadine | 2 | 1 – 3 | 27 | ≥ 24 | Unlikely | H, R | |
Ebastine | 2 | 1.5∗ | 10 – 20∗ | ≥ 24 | Possible | H, R | |
Fexofenadine | 2 | 2.5 | 14 | 24 | Unlikely for CYP Possible for p-glycoprotein | R | |
Levocetirizine | NA | 0.3 – 1.3 | 5.5 – 8.5 | ≥ 24 | Unlikely | H, R | |
Loratadine | 1 – 3 | 0.9 – 1.5 | 12 – 15 | 24 | Unlikely | H, R | |
Mizolastine | 1 | 1.5 | 13 | 24 | Possible | H |