Absolutely wrong.
Maybe what people don't realise is that if you buy your drugs on the streets or in the dark web, then you can't blame "opiates" if something bad happens.
Natural poppy based meds are 100% safe to take for a lifetime, many literature about it. Months ago I posted a thread about the cases of both an old lady and an old folk from India in their 80s, addicted for over 6 decades, healthy as bulls.
Even many of sinthetic opis are also very safe. Maybe Demerol when abused can lead to neurotoxicity, or high doses of methadone, dextropropoxifene or loperamide can be cardiotoxic, but that's it.
This is all a major point of contention for people. Opioids in general are not harmful to the body. We know that in a controlled setting, constipation is known to be the most common and potentially detrimental side effect of Opioids. Granted, this is not something to be taken lightly, as people do indeed die from complications of Opioid-Induced Constipation.
The stuff like infections to the heart and other damage is generally caused by factors secondary to the actual drug itself. This could mean blunt needles causing injury to veins, infection from unhygienic practices/drugs and et cetera. So we can definitely say Opioids are not harmful in a primary sense. The lifestyle of living as an addict is often what causes the most damage. Chronically, this means stuff like malnutrition, vitamin/mineral deficiency, lack of natural sunlight and so on.
This is why I am a proponent for prescribed Heroin/Morphine or what have you. I believe in a tightly controlled setting, users can be happy, healthy, free from cravings and with the potential to reintegrate. I think the concept of decriminalizing drugs with not infrastructure in place is a terrible thing. It's an example of doing things halfway and getting totally fucked for it. You don't need to hear it from me, it's worked in many places in which it's been instigated.
Are you injecting these things? If that's the case, then yes, I would wager that your stated issues are likely correlated. I say this just because I've known plenty of people who have been through the same thing.
If you're taking them by other ROA's outside of injection, it's still possible for something lke this to happen. I'd say it's less likely though. In general, using these pressed Fentanyl pills is inherently dangerous. Injection Heroin is inherently dangerous. They used to tell me "you're flipping a coin man" when in reality, you had a comparatively small chance of actually dying back in those days. Now, I hear of people dying every day in droves. Lifelone users, first-timer users and everyone in between. It's an unprecedented level of death even for the Opioid-using community; people who are already pretty accustomed to death and misery.
You know they're not Oxycodone. They're often either a Fentanyl analog or a -Nitazene-class Opioid although others from different Opioid "families" have been seen that are analogs of neither of the aforementioned.