Have I been dosing wrong? :o
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I started with a 20mg vial, which I reconstituted with 2ml of bac water.
I then transferred this to my pen cartridge, which holds 3ml/300 units, so it didn't fill it completely.I then dialed what I thought was the correct dosage, of 1 "click" being equal to 1mg of dosage, so for 2mg, I dialed the pen to "2", for 6mg, dialed to "6" etc.
I've been doing this for the past several weeks, and I just realized that I may be doing it wrong, and only dosing 1/10th of the dosage I should? In other words, for a 10mg dose, I should be dialing the pen to "100" instead of "10"? My pen actually only goes to 60, so I would have to dial to 60, inject that, and then 40 more?
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If you are trying to dose 1mg you would need to go to 10iu on the pen. 10 clicks if you pen increments 1 iu at a time
@Commander said in Have I been dosing wrong?
:If you are trying to dose 1mg you would need to go to 10iu on the pen. 10 clicks if you pen increments 1 iu at a time
That's what I'm realizing now, so yeah I've been dosing at 1/10 of what I thought I was. No wonder I've had no side effects LOL.
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@commander When going to higher does, like 10mg, what is the recommended way to accomplish this with a pen that only dials to 60? I assume just dial 60 and inject, and while needle is still in dial 40 and push that?
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I started with a 20mg vial, which I reconstituted with 2ml of bac water.
I then transferred this to my pen cartridge, which holds 3ml/300 units, so it didn't fill it completely.I then dialed what I thought was the correct dosage, of 1 "click" being equal to 1mg of dosage, so for 2mg, I dialed the pen to "2", for 6mg, dialed to "6" etc.
I've been doing this for the past several weeks, and I just realized that I may be doing it wrong, and only dosing 1/10th of the dosage I should? In other words, for a 10mg dose, I should be dialing the pen to "100" instead of "10"? My pen actually only goes to 60, so I would have to dial to 60, inject that, and then 40 more?
@Blazer Let's walk through the math slowly.
You added 2 ml of bac water to a 20mg vial. So your concentration is 20mg/2ml = 10mg/ml.
You then transferred it to a pen.
Pen (and insulin syringe) units/clicks are 0.01 ml - 1/100th of a ml.
10mg/ml = 10 mg / (1ml * (100 units/ml)) = 10mg/100 units = 0.1 mg/unit
10 units at that concentration would be 10 units *0.1mg/unit = 1 mg
(I personally find it easier to think of the concentration as 0.1 mg/unit = 1 mg/ 10 units).
Does any of that help?
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@commander When going to higher does, like 10mg, what is the recommended way to accomplish this with a pen that only dials to 60? I assume just dial 60 and inject, and while needle is still in dial 40 and push that?
@Blazer said in Have I been dosing wrong?
:@commander When going to higher does, like 10mg, what is the recommended way to accomplish this with a pen that only dials to 60? I assume just dial 60 and inject, and while needle is still in dial 40 and push that?
I actually wouldn’t use a pen for more than 25iu of anything.
Even if you filled the cartridge up with 3ml, at 25iu thst is only 12 shots. Any less than that and I wouldn’t go through the hassle filling cartridges.
So I would just say use a regular 100iu insulin syringe -
@Blazer Let's walk through the math slowly.
You added 2 ml of bac water to a 20mg vial. So your concentration is 20mg/2ml = 10mg/ml.
You then transferred it to a pen.
Pen (and insulin syringe) units/clicks are 0.01 ml - 1/100th of a ml.
10mg/ml = 10 mg / (1ml * (100 units/ml)) = 10mg/100 units = 0.1 mg/unit
10 units at that concentration would be 10 units *0.1mg/unit = 1 mg
(I personally find it easier to think of the concentration as 0.1 mg/unit = 1 mg/ 10 units).
Does any of that help?
I find the math easier if you just multiply the MG on the vial x10 to give the mcg per unit. Then you just multiply that by the number of mLs used.
20mg vial x10= 200mcg per unit.
2mL of bac water used so 100mcg per unit
A draw of 10units would get 1 mg.Same math just another way of looking at it to understand it.
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@Blazer said in Have I been dosing wrong?
:@commander When going to higher does, like 10mg, what is the recommended way to accomplish this with a pen that only dials to 60? I assume just dial 60 and inject, and while needle is still in dial 40 and push that?
I actually wouldn’t use a pen for more than 25iu of anything.
Even if you filled the cartridge up with 3ml, at 25iu thst is only 12 shots. Any less than that and I wouldn’t go through the hassle filling cartridges.
So I would just say use a regular 100iu insulin syringe@Commander said in Have I been dosing wrong?
:I actually wouldn’t use a pen for more than 25iu of anything.
Even if you filled the cartridge up with 3ml, at 25iu thst is only 12 shots. Any less than that and I wouldn’t go through the hassle filling cartridges.
So I would just say use a regular 100iu insulin syringeI hear that, but then again, 12 shots at that rate is 3 months worth, assuming weekly doses?
