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Jul 29, 2024 · We must administer 0.1 mg per pound of body weight to a 20 lb child. To calculate how much of the drug should be administered: Dose = Weight × Dosage. Dose = 20 lbs × (0.1 mg / 1 lbs) = 2 mg. To calculate the dose of the syrup: Liquid dose = Dose/Concentration. Liquid dose = 2 mg/(1 mg / 2 mL) = 4 mL.
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A single paracetamol dose for a child of 19 kg is 285 mg. To...
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This steroid conversion calculator is a tool used to...
- Opioid Converter
The equianalgesic chart is a table presenting the results of...
- Paracetamol Dosage Calculator
mg/kg/day or mcg/kg/day; mg/kg/dose or mcg/kg/dose. The key formula to remember when determining the daily required dose to administer is: Medication Daily Dose (mg/day) = Dose in mg/kg x Patient weight in kg. Depending on the selected dose frequency, the correct amount of drug will also pe expressed as amount per dose.
Nov 8, 2021 · We know there are 60 minutes in one hour. This is placed next in the equation. Cancel out the labels until you are left with mcg/min. Step 4: Multiply numerators, multiply denominators, then divide numerator by denominator. Step 5: Divide by the weight in kilograms to get mcg/kg/min. Answer: 10 mL/hour.
- Introduction
- Basic Principles
- Dose by Weight
- Dosing in Renal Impairment
- Infusion Doses and Rate
- Opioid Conversion
- Concentrations
- Paediatric Dosing
- References
Drug calculation skills are an important part of prescribing, as calculation errors may lead to significant patient harm. This is particularly important when prescribing for the elderly and paediatric populations, as they are more vulnerable to medication-related harm. Frailty and reduced renal function are commonly seen in the elderly population. ...
When carrying out a drug calculation, there are some basic principlesto keep in mind: 1. Convert all dose units to the same units to avoid confusion 2. Percentage concentrations are expressed as weight/volume (w/v) = 1 g in 100 ml; volume/volume (v/v) = 1 ml in 100 ml; weight/weight (w/w) = 1 g in 100 g; volume/weight (v/w) = 1 ml in 100 g 3. For c...
Actual body weight
A 50-year-old patient who weighs 105 kg with type 2 diabetes is to be switched to insulin pens. You decide to prescribe a starting dose of 0.2 units/kg. Calculate the insulin dose in units for this patient.
Ideal body weight
You are the FY1 on the respiratory ward. You have been asked to prescribe intravenous aminophylline for a 53-year-old man who weighs 89 kg and is 165 cm. He was admitted with acute severe asthma and was not previously on theophylline. He is allergic to penicillin, does not smoke and has no co-morbidities. The consultant has requested an initial loading dose of 6mg/kg and a subsequent maintenance dose of 0.7 mg/kg/hour. Calculate the loading dose and maintenance dose of intravenous aminophylli...
Adjusted body weight
In clinical practice, the adjusted body weight may be used in obese patients who are >20% of their ideal body weightto prevent overdosing in these patients. This only applies to some medications with poor distribution in adipose tissues, such as aminoglycosides (e.g. gentamicin and amikacin) and varies depending on local guidelines. Resources 1. Adjusted body weight calculator
A 72-year-old man has been admitted with a pulmonary embolism. He weighs 70kg. According to local guidelines, subcutaneous enoxaparin is the first-line treatment for pulmonary embolism. His serum creatinine level is 220 micromol/L. What dose of enoxaparin should be prescribed for this patient? Calculate the patient’s renal function using the Cockcr...
During your rotation in the emergency department, a 24-year-old woman who weighs 60 kg was brought in by ambulance following a seizure. Whilst in ED, she develops prolonged seizures and status epilepticus. The consultant has decided to commence intravenous phenytoin with a loading dose of 1000 mg, which is to be diluted in 100 ml of normal saline. ...
A patient requires switching from oral morphine to fentanyl patches as they are now nil by mouth. The patient takes MST Continus 30 mg twice daily and Oramorph 10mg/5ml, 5 ml four times a day for breakthrough pain. Using the information provided, what is the recommended strength of fentanyl patch in micrograms/hour for this patient? Note: Round dow...
A 40-year-old woman, who weighs 50 kg, is hypokalaemic. She requires a potassium infusion of 500 ml of 0.18% w/v solution. You have 15% potassium chloride concentrate in stock. How much 15% potassium chloride concentrate (in ml) is required for this infusion?
Dose by age
A 6-year-old child presents with fever, sore throat and a “sandpaper” rash which started from the chest and spread towards the abdomen. You have diagnosed the patient with scarlet fever and decided to prescribe phenoxymethylpenicillin for this patient. How many bottles of phenoxymethylpenicillin should you prescribe for this patient? Available pack sizes: 1. 125 mg/5ml 100 ml 2. 250 mg/5ml 100 ml Resources: 1. BNF: Phenoxymethylpenicillin
Dose by weight
You were required to prescribe nitrofurantoin for a urinary tract infection in a 10-month-old child who weighs 9.5 kg. Nitrofurantoin suspension comes in 25mg/5ml. Calculate the dose in ml required for this patient. Resources 1. BNF: Nitrofurantoin
Dose by body surface area
A 5-month-old child was admitted with encephalitis following an episode of chickenpox. He requires aciclovir 500mg/m2every 8 hours for 10 days. The child has a height of 66 cm and weighs 7 kg. Calculate the dose of aciclovir for this patient.
Electronic Medicines Compendium. Summary of Product Characteristics. Available from: [LINK]British National Formulary. Available from: [LINK]This dosage calculator or mg per kg dosage calculator is designed to help health professionals easily calculate the correct dose of any medication based on the patient’s body weight. The tool can calculate dose for both adults and children, provided that all required information is available. Outputs are displayed in a very easy-to-read format.
How many mcg/kg/min is the patient receiving? mcg/kg/min → 1000mcg 1mg 1000 m c g 1 m g x 400mg 250mL 400 m g 250 m L x 15mL 60min 15 m L 60 m i n x 2.2lbs 1kg 2.2 l b s 1 k g x 1 205lbs 1 205 l b s = 4.3mcg/kg/min 4.3 m c g / k g / m i n.
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The table below shows the mean values for weight, height, and sex by age; these values have been derived from the UK-WHO growth charts 2009 and UK 1990 standard centile charts, by extrapolating the 50th centile, and may be used to calculate doses in the absence of measurements. However, an individual's weight and height might vary considerably from the values in the table and it is important ...
