u/KTADiamond

I've lived in Seattle long enough to watch this city change. And one of the hardest things to watch has been what the overdose crisis has done to our neighborhoods, our people, and honestly, to me personally.

I'm a product designer and engineer. I went to college, I work in tech, and for a long time I felt like those skills existed in a completely separate world from the stuff that actually kept me up at night.

At some point, that stopped feeling okay.

So I built knowyoursubstance.com. It's a free, anonymous harm reduction tool — no ads, no paywalls, no tracking, no judgment. Just honest information for people who need it. Here’s what’s included :

• Drug interaction checker: up to 8 substances at once, sourced from NIH
• Medication lookup with FDA recall alerts
• Step-by-step overdose first aid for opioids, stimulants, and depressants
• Good Samaritan law info for each state
• Naloxone finder, syringe service locator, and 24/7 crisis lines

King County lost over 1,000 people to overdose in 2023. Seattle was averaging 17 a day as of early 2025. Those numbers represent real people…people who maybe just needed the right information at the right moment.

I maintain this solo, out of pocket, on top of my full-time job. It's still a work in progress and I'm learning as I go. If you use it and something feels off, I want to know.

Not asking for anything. Just putting it out there for whoever needs it. 💜

knowyoursubstance.com

I've lived in Seattle long enough to watch this city change. And one of the hardest things to watch has been what the overdose crisis has done to our neighborhoods, our people, and honestly, to me personally.

I'm a product designer and engineer. I went to college, I work in tech, and for a long time I felt like those skills existed in a completely separate world from the stuff that actually kept me up at night.

At some point, that stopped feeling okay.

So I built knowyoursubstance.com. It's a free, anonymous harm reduction tool — no ads, no paywalls, no tracking, no judgment. Just honest information for people who need it:

• Drug interaction checker: up to 8 substances at once, sourced from NIH
• Medication lookup with FDA recall alerts
• Step-by-step overdose first aid for opioids, stimulants, and depressants
• Good Samaritan law info for each state
• Naloxone finder, syringe service locator, and 24/7 crisis lines

King County lost over 1,000 people to overdose in 2023. Seattle was averaging 17 a day as of early 2025. Those numbers represent real people…people who maybe just needed the right information at the right moment.

I maintain this solo, out of pocket, on top of my full-time job. It's still a work in progress and I'm learning as I go. If you use it and something feels off, I want to know.

Not asking for anything. Just putting it out there for whoever needs it. 💜

knowyoursubstance.com

I've lived in Seattle long enough to watch this city change. And one of the hardest things to watch has been what the overdose crisis has done to our neighborhoods, our people, and honestly, to me personally.

I'm a product designer and engineer. I went to college, I work in tech, and for a long time I felt like those skills existed in a completely separate world from the stuff that actually kept me up at night.

At some point, that stopped feeling okay.

So I built knowyoursubstance.com. It's a free, anonymous harm reduction tool; no ads, no paywalls, no tracking, no judgment. Just honest information for people who need it:

- Drug interaction checker — up to 8 substances at once, sourced from NIH
- Medication lookup with FDA recall alerts
- Step-by-step overdose first aid for opioids, stimulants, and depressants
- Good Samaritan law info for Washington State
- Naloxone finder, syringe service locator, and 24/7 crisis lines

King County lost over 1,000 people to overdose in 2023. Seattle was averaging 17 a day as of early 2025. Those numbers represent real people, people who maybe just needed the right information at the right moment.

I maintain this solo, out of pocket, on top of my full-time job. It's still a work in progress and I'm learning as I go. If you use it and something feels off, I want to know.

Not asking for anything. Just putting it out there for whoever needs it.

knowyoursubstance.com

I've lived in Seattle long enough to watch this city change. And one of the hardest things to watch has been what the overdose crisis has done to our neighborhoods, our people, and honestly, to me personally.

I'm a product designer and engineer. I went to college, I work in tech, and for a long time I felt like those skills existed in a completely separate world from the stuff that actually kept me up at night.

At some point, that stopped feeling okay.

So I built knowyoursubstance.com. It's a free, anonymous harm reduction tool — no ads, no paywalls, no tracking, no judgment. Just honest information for people who need it:

\- Drug interaction checker: up to 8 substances at once, sourced from NIH
\- Medication lookup with FDA recall alerts
\- Step-by-step overdose first aid for opioids, stimulants, and depressants
\- Good Samaritan law info for each state
\- Naloxone finder, syringe service locator, and 24/7 crisis lines

King County lost over 1,000 people to overdose in 2023. Seattle was averaging 17 a day as of early 2025. Those numbers represent real people…people who maybe just needed the right information at the right moment.

I maintain this solo, out of pocket, on top of my full-time job. It's still a work in progress and I'm learning as I go. If you use it and something feels off, I want to know.

Not asking for anything. Just putting it out there for whoever needs it. 💜

knowyoursubstance.com

I've lived in Seattle long enough to watch this city change. And one of the hardest things to watch has been what the overdose crisis has done to our neighborhoods, our people, and honestly, to me personally.

I'm a product designer and engineer. I went to college, I work in tech, and for a long time I felt like those skills existed in a completely separate world from the stuff that actually kept me up at night.

At some point, that stopped feeling okay.

So I built knowyoursubstance.com. It's a free, anonymous harm reduction tool — no ads, no paywalls, no tracking, no judgment. Just honest information for people who need it:

\- Drug interaction checker: up to 8 substances at once, sourced from NIH
\- Medication lookup with FDA recall alerts
\- Step-by-step overdose first aid for opioids, stimulants, and depressants
\- Good Samaritan law info for each state
\- Naloxone finder, syringe service locator, and 24/7 crisis lines

King County lost over 1,000 people to overdose in 2023. Seattle was averaging 17 a day as of early 2025. Those numbers represent real people…people who maybe just needed the right information at the right moment.

I maintain this solo, out of pocket, on top of my full-time job. It's still a work in progress and I'm learning as I go. If you use it and something feels off, I want to know.

Not asking for anything. Just putting it out there for whoever needs it. 💜

knowyoursubstance.com

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