I can't say what the reason for this malady may be. Seemingly, it's the accumulation of your life from point of coricidin abuse up until now. I'm not far from you in terms of age but in general just a lazy drug taking thinker - far from a doctor, but i feel like anybody can uncover mysteries within themselves at the proper moment.
I truly believe we all experience the same things at different points on the same line.
I actually have a very similar thing going on right now in my body. It's not from DXM, it's from heavy abuse of heroin.
Now, not that the heroin itself caused damage but the things that I did while on heroin. Like, nod out in a chair. Doing this for years, just sitting there. Nothing happening. No body movement. This had detrimental effects on me which i was completely oblivious to up until years after the event.
Physical ailments that mirrored my anxieties that stem from the abuse i put my body through. I've damage a part of my Ear/Nose/Throat physiology, causing a very rare disorder called patulous Eustachian tube. When it is triggered, I literally go insane because I can't stop fixating on it. Why is this happening, how do i stop this, why me, I don't want this feeling. So in a public scenario, anxiety can trigger this physical ailment and then as my auditorial equilibrium is thrown out of balance, i suddenly become very self conscious about the way i sound and the volume at which I speak. It really is a crippling experience.
The muscle tissues in my legs had whittled down from a young athletes legs to two spindles not unlike a dying man of age 80, according to Doctors. But, as the muscle structures in my legs deteriorated, and I remained high.. it wasn't until much much later that I realized, the way that i am walking is literally destroying my body. Because i'm walking on legs that i used to have, thinking i'm the same body i've always been. Well, it's not true. Now, i've hyperextended my right knee, honestly not even sure if i'll be able to work tomorrow. But I have to, so I'll hyper extend it even more.
One night I fell asleep after a long meth binge onto my right arm. Being a bass player, i cherish my hands and fingers. Coincidentally, I was using being in a band as a disguise to be able to abuse drugs. What did I create for myself? Well, i woke up with no feeling in my right hand at all. I had fallen asleep when the meth wore off for around 14 hours on the hard floor with my arm curled under my chest. I wasn't able to feel my hand for half the day, and from that day forward I feel the tendency in my shoulder and elbow to snap that nerve out of whack and cause me instant pain and numbness in half my hand. So now I deal with chronic cubital tunnel.
But all these physical ailments are just memories resurfacing in the mind which is at times more obvious in the body.
Anyway, I realized how to heal myself. Realize you are not alone, we can heal ourselves, the answers all arrive at points that may seem unclear at the time. The fact that you want to understand the nature of your ailments, the mind/body relationship shows that you are already on the path to healing. How long it will take depends on how honest you are with yourself regarding your own health.
I personally am trying to consistently think about healing and slowly add more and more actions on a daily basis. I know some scars will never heal but remain as a physical memory.
But I need to make drastic lifestyle changes, or my ailments will spiral out of control and eventually become a barnacle upon my vessel.
In summary, coricidin may be the biggest contribution, but it may not. I have measurable physiological and physical damage from psychedelics, opiates, and stimulants. Ultimately we travel into the mist together on this one. Gotta get up and change something.
One nice piece of wisdom i can give is that we are cyclical by nature. So 15 years to the coricidin, 15 years until now... the pattern reveals a change is soon to come, in my opinion.
