An LTC isnt actually a real thing, and Im not sayin the issues dont exist for people, I just mean an 'LTC' isnt a used term for mental/physical illness caused by drugs. So it depends on what you perceive an LTC to be and what youre specifically asking? IMO most cases of an LTC come in 4 types;
1. Some sort of anxiety/depression disorder at various levels
2.DP/DR (extreme anxiety response)
3. HPPD/vision problems (usually co-morbid with 1. And 2.)
4. Other random physical/mental afflictions (e.g. few have complained of just muscle twitches and nothing else) that may or may not be related to drug use
Thats just my take on it, but with that being said, pretty much most drugs could bring out some form of mental health disorder, including alcohol. As for DP/DR again, Ive read of numerous drugs setting it off. HPPD tends to be more focused on the psychedlic family of drugs and things like MDMA, diphenhydramine, ketamine etc.
For me, MDMA + MXE (well, it felt more like MXE or something similar rather than the ketamine we thought we were getting) caused my 'LTC' which has consisted of moderate DP/DR and mild HPPD. But in hindsight, I believe the MXE is to blame, or at least the addition of that is to blame, I had been consuming MDMA on and off for around 8 year period with very little issue up until this point except maybe some mild anxiety/depression caused by use.
Hope this answers your question! Are you worried it might have been something else that caused your LTC out of interest?