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    Last updated: April 2024

     

    Nomenclature of drugs

    The International Non-proprietary Names (INN) of drugs is used in this guide.

    Dosage

    Prescription tables showing average dosage in drug units (tablets, ampoules etc.) according to weight or age of patients are included for the most commonly used drugs.

    • For children:
      • Oral drug dosages are expressed in milligrams per kilogram per dose, followed by the number of doses per day (e.g. 10 mg/kg 3 times daily). For doses expressed in ml (oral solutions and suspensions, or syrups), always use the measuring device included in the packaging by the manufacturer. If the measuring device is not provided with the drug, use an oral syringe, a measuring spoon or a medicine cup with graduations. Teaspoons and tablespoons should only be used as a last resort when no measuring device is available. A teaspoon contains approximately 5 ml, and a tablespoon approximately 15 ml. 
      • Injectable drug dosages are also expressed in milligrams per kilogram per injection, followed by the interval between injections (e.g. 10 mg/kg every 8 hours). 
    • For adults:
      • Oral drug dosages are expressed in milligrams or grams per dose, followed by the number of doses per day (e.g. 500 mg 3 times daily). 
      • Injectable drug dosages are in general expressed in milligrams or grams per injection, followed by the interval between injections (e.g. 500 mg every 8 hours).

    Dilution and administration of injectable drugs

    Refer to the manufacturer’s instructions as the primary source of information. Manufacturer’s instructions are tailored to the specific formulation and concentration of a drug to ensure its effectiveness and safe use.

    The dilution and administration instructions in this guide are provided as a guidance, to be used only if the manufacturer’s instructions are not available.

    Symbols

    Prescription under medical supervision

     

    This box indicates potentially toxic drugs, administered under medical prescription only in many countries.

     

     
    This symbol is used to draw attention to drugs whose toxicity is significant and whose use requires specific precautions and/or closer patient monitoring.

     

    Recommendations for drug storage

     

     
    Protect from light
     

     

     
    Protect from humidity
     

     

    If no temperature for storage is recommended, this indicates that no information was found in medical literature.