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submitted 2 weeks ago* (last edited 2 weeks ago) by tunasyne to c/mtf

the label and the manufacturer of my een say not to expose it to light. what happens if it is? last week i did my injection, but forgot about the warning and was holding it up near my bathroom light while i drew the needle. is it still safe/effective? tonight's my next shot, probably should have asked sooner :P

edit: only realized my mistake after finishing the injection and noticing the label had turned red

edit 2: pic of the label bein red

edit 3: got a pretty quick reply from the manufacturer. label turning red/black is normal actually, from heat/moisture, which makes sense. also according to the manufacturer, the e is slightly pink: normal for mct oil when exposed to light, but as long as it doesn't get worse it should be fine.

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[-] FrenziedFelidFanatic@pawb.social 24 points 2 weeks ago

Disclaimer: I have no experience with this drug class, and my medical knowledge is that of a novice.

“Don’t expose it to light” typically means “don’t leave it in the sun too long.”

These warnings usually mean that the chemical will denature / break down when exposed to light or heat which leads to a decrease in efficacy. Most chemicals will only do this in response to IR or UV light. If the reaction is from IR, then the primary worry is keeping it cool enough. By the nature of indoor lights, your bathroom light is almost certainly not emitting enough UV to cause a reaction.

If the drug is colored (I don’t believe this to be the case here), then visible light could cause a reaction, though I would still find it unlikely that a drug would lose sufficient efficacy due to a bathroom light.

I wouldn’t worry unless it got too warm for too long.

I can’t say anything about the label turning red without a bit more info about the container itself (is it just a vial?), but it sounds like it might be an indicator that you took your last dose.

As always, contact your doctor or provider if you have concerns.

[-] tunasyne 5 points 2 weeks ago

yeah that's what i was thinking too. i'll have to reach out to the manufacturer but that's gonna take a while for their reply :(

i put a picture of the label in the body of the post just in case.

[-] dandelion 7 points 2 weeks ago* (last edited 2 weeks ago)

another +1 for it's fine

a bathroom light is a bulb, not the sun, and at most might heat the vial (which happens when the vials are made, a one time heating should be fine).

The concern is about sunlight, not all forms of light. The problem is that UV light from the sun can denature the chemicals (just like it can give people skin cancer).

[-] 0x2640 5 points 2 weeks ago

its fine, just dont keep it exposed to light for extended periods of time, it can cause the oil to go rancid quicker

[-] tunasyne 3 points 2 weeks ago

the label itself turned red when I was done that night though... is that OK?

[-] 0x2640 3 points 2 weeks ago
[-] tunasyne 3 points 2 weeks ago* (last edited 2 weeks ago)
[-] 0x2640 3 points 2 weeks ago

are u sure u didnt get something on it? that doesnt seem normal

[-] tunasyne 2 points 2 weeks ago

um pretty sure! unless my hands stained it lol. i think maybe they made the label reactive to light so you know when it went bad? i honestly don't know. gonna have to contact the manufacturer but that's gonna take weeks for a reply :(

[-] Zorsith 4 points 2 weeks ago

Did you get rubbing alcohol on it? Ive seen reactions to labels with similar splotchy-ness from rubbing alcohol, but not the color: the color could just be something from the label maker used for it.

[-] tunasyne 3 points 2 weeks ago

HOLY SHIT hey that might actually be it.

[-] Zorsith 5 points 2 weeks ago

Sounds about right for thermal print labels to me. Label printers are their own special subset of demons from normal printers; much more evil and janky.

this post was submitted on 14 Apr 2025
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