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    hello im curently doing my training to be a dispenser and im really struggling with my calculations my teacher has given me these practise ones could anyone explain it to me

    1) calculate the quantity of each ingredient required to dispense the following prescription :
    (then there is a picture of a script with the following)

    chloral hydrate 200mg
    blackcurrent syup 1 ml
    water 0.1ml
    syrup to 5ml

    mitte 300ml

    i dont understand how to work it out ?

    and then the next one is even harder ,,,

    2)calculate the quantity of each ingredient required to dispense the following prescription :
    (then there is a picture of a script with the following)

    salicylic acid 2%
    yellow soft paraffin 20%
    emulsifying oint 18%
    hard paraffin 10%
    coconut oil 50%

    mitte 50g Apply ON

    well with this one i dont understand the %s? ? could anyone help me and put it out how im suppose to do these ? many thanks

  • #2
    Re: help calculations

    seems like everyone is having problems with calculations. Which uni u at
    3rd yr pharmacy student - bath

    Comment


    • #3
      Re: help calculations

      ermmm im not at uni im doing my training on the job im training to dispense at the moment im only a hca

      Comment


      • #4
        Re: help calculations

        As I have previously said. Poor primary school teaching..
        johnep

        Comment


        • #5
          Re: help calculations

          Originally posted by jayde-89 View Post
          hello im curently doing my training to be a dispenser and im really struggling with my calculations my teacher has given me these practise ones could anyone explain it to me

          1) calculate the quantity of each ingredient required to dispense the following prescription :
          (then there is a picture of a script with the following)

          chloral hydrate 200mg
          blackcurrent syup 1 ml
          water 0.1ml
          syrup to 5ml

          mitte 300ml

          i dont understand how to work it out ?

          and then the next one is even harder ,,,

          2)calculate the quantity of each ingredient required to dispense the following prescription :
          (then there is a picture of a script with the following)

          salicylic acid 2%
          yellow soft paraffin 20%
          emulsifying oint 18%
          hard paraffin 10%
          coconut oil 50%

          mitte 50g Apply ON

          well with this one i dont understand the %s? ? could anyone help me and put it out how im suppose to do these ? many thanks
          chloral hydrate 200mg
          blackcurrent syup 1 ml
          water 0.1ml
          syrup to 5ml

          mitte 300ml

          Think of it as a recipe and you are scaling it up to feed more people.
          It tells you how much you need to make 5ml
          To make 300ml you will need 300/5 times more which is 60.

          Chloral hydrate 200mg x 60 = ??
          Blackcurrant syrup 1ml x 60 = ??
          Water 0.1ml x 60 = ??
          Syrup to 5ml x 60 = 300ml

          I'll leave you to fill in the amounts. Usually once the quantity goes above 1000mg switch to grams.

          salicylic acid 2%
          yellow soft paraffin 20%
          emulsifying oint 18%
          hard paraffin 10%
          coconut oil 50%

          mitte 50g Apply ON

          First check all the ingredients add up to 100%, which they do.
          Now you can do this two ways.
          Hard way is to calculate each ingredient individually eg.
          2% = 2/100 and multiply by the quantity you want (50g) 50*2/100
          And repeat for the other amounts
          The other way is to look at the amount required (mitte 50g).
          So assume you are making 100g (100%) and that 50 is a half of 100, simply
          half the quantities of the ingredients.

          Now I'll let you do the sums.
          Post your answers back here for marking by sunday evening, or lose out an a gold star.
          47 BC : Julius Cesar : Veni Vidi Vici : I came, I saw I conquered.
          2018 AD : Modern Man : I shopped, I clicked, I collected.
          How times change.

          If you find you have read something that has upset or offended you an anyway please unread it at once.

          Comment


          • #6
            Re: help calculations

            question 1
            200mg x 60 = 12g
            1ml x 60 = 60mls
            0.1ml x 60 = 6 mls
            5ml x 60 = 300ml so they are the qauntity
            Last edited by jayde-89; 2, February 2008, 07:09 PM.

            Comment


            • #7
              Re: help calculations

              question 2
              2% = 2/100 x 50 = 1g
              20%= 20/100 x 50 = 10g
              18%= 18/100 x 50 = 9g
              10%= 10/100 x 50 = 5g so these ae the quantitys needed ?

              Comment


              • #8
                Re: help calculations

                Originally posted by jayde-89 View Post
                question 1
                200mg x 60 = 12g
                1ml x 60 = 60mls
                0.1ml x 60 = 6 mls
                5ml x 60 = 300ml so they are the qauntity
                Nice one.

                Damn another script has just come in for the same thing, only its for 500ml.
                What do we need this time?
                47 BC : Julius Cesar : Veni Vidi Vici : I came, I saw I conquered.
                2018 AD : Modern Man : I shopped, I clicked, I collected.
                How times change.

                If you find you have read something that has upset or offended you an anyway please unread it at once.

                Comment


                • #9
                  Re: help calculations

                  Originally posted by Pharmanaut View Post
                  Nice one.

                  Damn another script has just come in for the same thing, only its for 500ml.
                  What do we need this time?
                  500/5=100

                  200ml x 100 = 20g
                  1ml x 100 = 100ml
                  0.1 x 100 = 10 ml
                  5ml x 100 = 500ml

                  Comment


                  • #10
                    Re: help calculations

                    Originally posted by jayde-89 View Post
                    500/5=100

                    200ml x 100 = 20g
                    1ml x 100 = 100ml
                    0.1 x 100 = 10 ml
                    5ml x 100 = 500ml
                    Sorted.
                    No more chloral scripts today!
                    you did mean 200mg x 200 = 20g.
                    47 BC : Julius Cesar : Veni Vidi Vici : I came, I saw I conquered.
                    2018 AD : Modern Man : I shopped, I clicked, I collected.
                    How times change.

                    If you find you have read something that has upset or offended you an anyway please unread it at once.

                    Comment


                    • #11
                      Re: help calculations

                      Originally posted by jayde-89 View Post
                      question 2
                      2% = 2/100 x 50 = 1g
                      20%= 20/100 x 50 = 10g
                      18%= 18/100 x 50 = 9g
                      10%= 10/100 x 50 = 5g so these ae the quantitys needed ?
                      +25g of coconut oil

                      Now add it all up and it should be 50g.

                      I think you have got the idea.
                      47 BC : Julius Cesar : Veni Vidi Vici : I came, I saw I conquered.
                      2018 AD : Modern Man : I shopped, I clicked, I collected.
                      How times change.

                      If you find you have read something that has upset or offended you an anyway please unread it at once.

                      Comment


                      • #12
                        Re: help calculations

                        Originally posted by jayde-89 View Post
                        question 2
                        2% = 2/100 x 50 = 1g
                        20%= 20/100 x 50 = 10g
                        18%= 18/100 x 50 = 9g
                        10%= 10/100 x 50 = 5g so these ae the quantitys needed ?
                        are these ones correct as well ??

                        and yes i meant 200mg

                        Comment


                        • #13
                          Re: help calculations

                          aww thanks fo explaining it to me thanks you so much

                          Comment


                          • #14
                            Re: help calculations

                            Originally posted by jayde-89 View Post
                            aww thanks fo explaining it to me thanks you so much
                            Glad to have helped.
                            47 BC : Julius Cesar : Veni Vidi Vici : I came, I saw I conquered.
                            2018 AD : Modern Man : I shopped, I clicked, I collected.
                            How times change.

                            If you find you have read something that has upset or offended you an anyway please unread it at once.

                            Comment


                            • #15
                              Re: help calculations

                              Originally posted by Pharmanaut View Post
                              you did mean 200mg x 200 = 20g.
                              Are you sure, Pharmanaut?: Final answer? Phone a friend?
                              Ze genuine Article, present & perfect!

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