October 22, 2020, 02:09:05 PM
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#### Jason27$$• Very New Member • Posts: 2 • Mole Snacks: +0/-0 ##### Need help with a calculation please « on: May 18, 2020, 04:33:36 PM » I have a stock solution of 1 mg/mL of a specific drug I need to take a dosage of 5 MICROgrams. So 1 drop of the stock solution would be 0.05 mL or 0.05 mg(50 ug) If i take 1 drop of the stock solution and dilute it in 9 drops of water it will be a 1:10 dilution So would the 10 drops contain 5 MICROgrams and would i just take this to get that dose or do i need to take 0.05 mL(1 drop) from this dilution? Sorry if this is a dumb question i just havent done this in a while- i appreciate the help #### chenbeier • Sr. Member • Posts: 1160 • Mole Snacks: +82/-20 • Gender: ##### Re: Need help with a calculation please « Reply #1 on: May 18, 2020, 04:51:49 PM » You give 50 μg = 1 drop together with 9 drops of water. 10 drop of this mixture still contain 50 μg. If you take now 1 drop of it, you would have 5 μg. #### Jason27$$

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##### Re: Need help with a calculation please
« Reply #2 on: May 18, 2020, 04:56:02 PM »
oh great thank you much appreciated