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dennis_jordan2026-04-18

I recently switched to Fiasp Flextouch Pen Inj 3ml as my primary fast-acting insulin. I was curious to hear if anyone else has made the switch and how they liked it. Does anyone have any advice on how to adjust doses and timing to get the best results? Have our experiences with side effects been similar or different?

1 min read
last active 4/18/2026
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Comments (4)

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hannah_washington4/14/2026

I love that it starts working so quickly. But it's a double-edged sword because you have to be very precise with your dosing.

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joshua_morgan4/14/2026

I've been on Fiasp for a few months now, and I've noticed a significant improvement in my post-meal blood sugar levels. It's definitely faster-acting than my previous insulin, but it took some trial and error to get the dosing right.

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justin_robertson4/14/2026

I've had some issues with low blood sugar lately. It's been a bit scary, especially the dizzy spells and confusion. Has anyone else had similar issues?

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judy_berry4/14/2026

I'm not a fan of the side effects. I've experienced some really bad muscle cramps and weakness, which I think is the low potassium levels. I've spoken to my doctor and we're trying to manage it, but it's been rough.