Please note that the doses below are based on the Trimethoprim component only. The ratio of Trimethoprim to Sulfamethoxazole is 1:5.
| Children: | Oral Dosage |
|---|---|
| Normal Dose: | 4/20 mg/kg every 12 hours |
| Normal Maximum Dose: | 20/100 mg/kg daily |
| Melioidosis: | 6/30 mg/kg (maximum 240/1200 mg) every 12 hours |
| Pneumocystis Jiroveci Pneumonia (PJP) Treatment: | 5/25 mg/kg (maximum 320/1600 mg) every 6 hours for 21 days |
| Pneumocystis Jiroveci Pneumonia (PJP) Primary or Secondary Prevention: | 5/25 mg/kg in 1 or 2 doses on 3 days a week |
| Shigellosis: | 4/20 mg/kg (maximum 160/800 mg) every 12 hours for 5 days |
| Toxoplasmosis Primary Prevention: | 4/20 mg/kg (maximum 160/800 mg) every 12 hours for 5 days |
| Pertussis Prevention and Treatment: | 4/20 mg/kg (maximum 160/800 mg) every 12 hours for 7 days |
The dosing range is for a general reference only. The prescribed dose could be independent to the reference range basing on the severity of the condition and other clinical factors. Please consult the prescriber and/or refer to Australian Medicine Handbook (AMH) or other credible resources for more accurate dosing.
Median Body Weight - 0 to 24months:
| Age | Male | Female |
|---|---|---|
| At term | 3.38 kg | 3.10 kg |
| 1 month | 4.45 kg | 4.10 kg |
| 2 months | 5.55 kg | 5.05 kg |
| 3 months | 6.35 kg | 5.79 kg |
| 4 months | 7.00 kg | 6.38 kg |
| 5 months | 7.50 kg | 6.86 kg |
| 6 months | 7.94 kg | 7.28 kg |
| 7 months | 8.28 kg | 7.62 kg |
| 8 months | 8.60 kg | 7.95 kg |
| 9 months | 8.85 kg | 8.22 kg |
| 10 months | 9.18 kg | 8.48 kg |
| 11 months | 9.40 kg | 8.70 kg |
| 12 months | 9.62 kg | 8.70 kg |
| 13 months | 9.85 kg | 8.92 kg |
| 14 months | 10.10 kg | 9.35 kg |
| 15 months | 10.32 kg | 9.58 kg |
| 16 months | 10.52 kg | 9.79 kg |
| 17 months | 10.70 kg | 10.00 kg |
| 18 months | 10.94 kg | 10.21 kg |
| 19 months | 11.13 kg | 10.40 kg |
| 20 months | 11.32 kg | 10.60 kg |
| 21 months | 11.53 kg | 10.81 kg |
| 22 months | 11.72 kg | 11.01 kg |
| 23 months | 11.95 kg | 11.21 kg |
| 24 months | 12.10 kg | 11.42 kg |
Median Body Weight - 0 to 24months:
| Age | Male | Female |
|---|---|---|
| 1 year | 9.62 kg | 8.92 kg |
| 2 years | 12.10 kg | 11.42 kg |
| 3 years | 13.90 kg | 14.15 kg |
| 4 years | 15.90 kg | 16.10 kg |
| 5 years | 18.00 kg | 18.25 kg |
| 6 years | 20.20 kg | 20.55 kg |
| 7 years | 22.70 kg | 23.05 kg |
| 8 years | 25.70 kg | 25.80 kg |
| 9 years | 29.0 kg | 28.90 kg |
| 10 years | 32.80 kg | 32.60 kg |
| 11 years | 37.20 kg | 36.75 kg |
| 12 years | 42.50 kg | 41.25 kg |
| 13 years | 46.00 kg | 45.90 kg |
| 14 years | 49.50 kg | 50.35 kg |
| 15 years | 56.40 kg | 52.10 kg |
| 16 years | 60.90 kg | 53.90 kg |
| 17 years | 64.50 kg | 55.10 kg |
For adults, please refer to Ideal Body Weight Calculator.
1. The Royal Melbourne Children's Hospital - About Child Growth
https://www.cdc.gov/growthcharts/data/set2clinical/cj41c072.pdf
2. Centers for Disease (CDC) Control and Prevention - WHO Growth Standards Are Recommended for Use in the U.S. for Infants and Children 0 to 2 Years of Age
https://www.cdc.gov/growthcharts/who_charts.htm#The%20WHO%20Growth%20Charts
3. Centers for Disease (CDC) Control and Prevention - Birth to 24 months: Boys Length-for-age percentiles and Weight-for-age percentiles
https://www.cdc.gov/growthcharts/data/who/GrChrt_Boys_24LW_100611.pdf
4. Centers for Disease (CDC) Control and Prevention - Birth to 24 months: Girls Length-for-age percentiles and Weight-for-age percentiles
https://www.cdc.gov/growthcharts/data/who/GrChrt_Girls_24LW_9210.pdf
5. Centers for Disease (CDC) Control and Prevention - 2 to 20 years: Boys, Stature-for-age and Weight-for-age percentiles
https://www.cdc.gov/growthcharts/data/set2clinical/cj41c071.pdf
6. Centers for Disease (CDC) Control and Prevention - 2 to 20 years: Girls, Stature-for-age and Weight-for-age percentiles
https://www.cdc.gov/growthcharts/data/set2clinical/cj41c072.pdf
7. Australian Medicines Handbook (AMH) - Trimethoprim with sulfamethoxazole
https://amhonline.amh.net.au/chapters/anti-infectives/antibacterials/other-antibacterials/trimethoprim-sulfamethoxazole
All calculators have been designed and tested for accuracy to the best of our knowledge. However, DoseMaster Pty Ltd does not make any promises or give any warranties about its absolute accuracy, reliability, completeness or suitability for any particular purpose. It is highly recommended to re-test your calculation repeatedly before any decision is made. The information provided are for general advice only and should not be relied on as personal advice. Each individual is subject to their own health/medical conditions, please always seek professional guidance from qualified healthcare professionals. To the extent permissible by law, DoseMaster Pty Ltd will not be liable for any expenses, losses, damages (including indirect or consequential damages), costs, injury, medical error, physical and mental harm or impairment, death which might be incurred as a result of the information being inaccurate or incomplete in any way and for any reason.
Please refer to our Disclaimer Page for more information.
Submenu 5 Content
