Peptide allergic reactions across batches and analogs

Posted last week about a comparable allergic response to cag and ended up tossing mine. Checked with Gemini and it turns out it has shown up in trials for a share of people. Your version hit harder than mine did, but I would stop using it for sure. It reads like a full anaphylactic episode and you are fortunate to be here talking about it instead of in an ER.

This is clearly an allergic reaction and repeating it would only make things worse. I would pick up an epi pen or the nasal version in case something else new sets off the same response. You were close to needing the ER. Instead of discarding the vial you could pass it along to someone else.

Too bad you were hoping it might serve as a backup option. Does this make you wary of trying eloralintide since it targets the same receptors? Hoping for your sake the issue ties to something else in the mix or just that particular batch rather than the compound itself. If I were in your spot I would begin with a tiny amount, take an oral antihistamine half an hour ahead, and keep an epi pen ready. Having someone else around would also be smart.

Sorry to hear that happened. I have been worried about the same thing even though it has not hit me yet. I am on 8mg tirz and reta with split doses like you. That is my biggest worry. Be cautious with the cag. What do you figure is behind your resistance to the glp1s?

Glad you came through okay. I have noticed your posts before and they helped with my own research so reading this gave me a jolt. On the lack of suppression from glp1s, have you tried taking a break from them? If yes how long was the pause? How long have you been using glp1s and what were the highest doses? It is rough for you but it raises the question whether some people end up with a lasting change in how they respond to these analogues. That kind of shift shows up more with serotonergic drugs or benzos but individual differences can be bigger than expected.

Had not come across this kind of reaction to cagrilintide before. Thanks for sharing. I read through the eloralintide and cagrilintide threads in case tirz and reta ever quit working for me. Would be frustrating to face what you did. Scary situation.

Really sorry that happened. Cag works well. I would be careful about trying elora too. Glad it did not turn into full shock. If you ever test elora keep an epi pen and a friend nearby. Glad you are fine.

This matches anaphylaxis. I went through the same thing three weeks ago with tesamorelin after using it safely before. Would not risk another exposure since the next reaction can hit harder. Time to get an epi pen or nasal version because other compounds might trigger it now. Looking into it I have seen reports with several different compounds including the glp1s. Would skip ampoules. If shock sets in there may not be time to open one and draw everything up.

Slightly off topic but how long were you on the highest doses of reta and tirz before the suppression stopped?

This is wild. Sorry you are dealing with it but thanks for posting. I have read you should begin cag at a low amount like 250mcg. Maybe the dose size made the reaction stronger.

Good practice to begin any new compound with a micro dose. I always start with a few mcg, wait ten to fifteen minutes then add a bit more. Repeat until reaching a low starting amount.

Feel for you and glad it turned out okay. I have used several peps and always jumped straight to the normal protocol so I guess I have been fortunate. Need to change that habit.

I thought .6mg was the usual starting amount.

That is a sizable amount. I thought 250mcg was the suggested starting level but in your case it probably would not have changed the outcome. If you are allergic then you are allergic. Might as well pass the vial along somewhere. It could also rule out elora though that one only hits a narrower set of amylin receptors while cag hits all of them. Would not test either again without an epi pen or nasal version ready. Sorry that happened.

Sorry this happened it sounds frightening. The symptoms line up more with anaphylaxis than a normal side effect. It also does not match what usually happens from simply taking too much cagrilintide. Still would not assume it was the cagrilintide itself or that every amylin receptor agonist would cause the same issue. Could have been the peptide an excipient the water contamination or even the wrong product. Too many unknowns to be certain. Would not use that vial again or pass it to anyone else without full disclosure. Another reaction could be serious and its intensity would be hard to predict. Would get some epinephrine on hand. I have been meaning to do the same and just have not. Heading to order some now. Hope you feel better.

Glad you are okay.

Really glad you are okay. Need you healthy enough for certain future plans.

Hope it is not too soon for a joke. Question is whether you ate during those two hours. Maybe that is how it works. Joke over. Planning to try it again at one third the dose?

This really does sound like anaphylaxis. Not clear from the post what steps were taken but going to a hospital was not mentioned. Once breathing trouble or facial swelling appears the only safe move is to call an ambulance. There is no way to know if it will worsen or improve and the worse outcome could be fatal. Strongly advise against ever testing it again to confirm a true allergy. Just treat it as one and avoid the compound. A doctor doing a test dose would only consider it in a controlled setting with resuscitation gear available and would use a much smaller fraction of the dose. Attempting it at home carries too much risk even with an epi pen ready. An allergy specialist could potentially run the test but since the drug is not approved yet they would likely hesitate with a research peptide. And in ge

A cross reaction with elora cannot be ruled out. The sequences share some parts but also differ. No one knows if the reaction came from a shared section or if the changes alter the structure enough to avoid it. Here is a comparison of positions and residues.

That would have scared me too. With the itching swelling numb lips racing heart and breathing trouble right after the shot I would never use cag again. It reads far more like a hypersensitivity reaction than a side effect. The lip heart and breathing signs are classic for anaphylaxis. Count yourself lucky it did not get worse and get some epinephrine ready right away. Not sure it means every amylin peptide will cause trouble but I also would not test that assumption alone. I had a sudden hypersensitivity reaction while using mots. Mine did not reach the breathing stage but it was a full body scary event. No more mots for me ever. Glad you are okay it is not something to ignore.

Is it possible you and the other person who reacted last week both received a tainted batch? Has it been tested? Maybe it is not the cag itself just that particular one. Still would not suggest trying it again. Glad you are okay.

My reaction affected my whole body instead of staying local to the shot area. No prior experience with any kind of spot-specific response from injections. In reply to the query about which one it was, mine came from a different provider than the original post described. Maybe they shared an origin anyway? Impossible to say for sure.

Strange how the amount you began with surpassed what most others take at first. Beyond the allergy response nothing else occurred. I've come across info showing that unidentified sign in those recent batches without active ingredient appeared consistent across every zero result case. Questionable if pursuing it further holds value though the checking process looks detailed yet odd to see absolutely no gains from such a big quantity.

A friend of mine ran into that exact trouble with the first one and then the second. Taking an antihistamine calmed everything down inside half an hour and it shook him up so badly he refuses to try either again. I keep a supply of antihistamine nearby any time I start something new.