At this point I am completely abstinent from synthetic chemicals (including simple things like Tylenol), I will only do natural medicines. I will explain the events that caused me to arrive at this personal choice.
I used to do a wide array of synthetic chemicals recreationaly, through the use of LSD I began to cultivate a sense of spirituality - my intentions in using medicines shifted from a recreational emphasis to a purely spiritual emphasis and focus. By spiritual I mean that the focus was placed on my own healing, learning more about myself, and the surrounding universe rather than a focus of fulfilling sensory desires at the expense of my own healing process. I found, as I continued my spiritual development, that many of the energies associated with synthetic drugs and synthetic drug culture were simply incongruous with the lifestyle I was trying to live.
I believe that when the natural plant medicine from the earth is taken and turned into a synthetic medication, the energy of it is completely changed. I believe a lot of this has to do with the intentions of the chemists and the other individuals who are facilitating the distribution of these substances.
When a plant medicine is grown directly from the earth, or grown by someone who puts tender care and love into it, the plant will maintain a very pure vibration that has been cultivated by the love and grace of our mother. These medicines, in their pure form, can show you things about yourself and provide you with absolutely amazing healing - when you used these medicines as they were intended to be used by our mother gaia, the quality of the vibration is extremely healing and if you are willing to do the work involved in the healing process these medicines will take you through, you can go to extraordinary places - far beyond any of the realms synthetic medications can take you to - in my experience at least.
On the other hand, my experience with synthetic medication has been that when man-kind chooses to manipulate the molecular structure of these plants they are often doing so out of a selfish intention, or at least an intention that is not as pure as the original vibration infused within the medicine. This applies particularly to drugs like cocaine, pharmaceuticals, etc, but I believe it also applies to psychedelics such as LSD, MDMA, etc.
The people responsible for creating and distributing drugs use alchemy to reconfigure the intention and the vibration of the molecules. Many major alkaloids that were originally in the plants are removed, throwing the medicine out of balance with it's natural form of manifestation. When you are consuming these drugs into your body, you are also consuming the intentions that have been infused within the molecular structure of the chemical in question.
I am of the opinion that man-kind is incapable, at least in this stage of our development, of chemically manipulating nature's natural medicine cabinet in a way that is healing. All we have done is created a distorted form of medicine that caters to our own desires and sensory gratification rather than our own healing. It has contributed to throwing us out of balance with nature, and we are no longer in harmony with the mother gaia on a collective level because of this and many other things.
One example of this - the Coco leave in South America that cocaine is made out of, in it's natural form it is one of the healthiest herbs you can eat, it is extremely beneficial to the natural constitution of your organism and it has many nutrients, especially for pregnant women - it is one of the healthiest herbs a pregnant woman can eat. On the other hand, when you take that plant, tear it apart, extract a specific part of it with the intention of making money, running drug cartels, and experiencing a stimulant effect that is pleasurable but ultimately unhealthy for the organism, then all of a sudden you have all of these problems that were not there before - people killing each other over it, people ODing, people getting addicted, etc, etc.
Anyway, my 2 cents, I will elaborate more if anyone needs clarification
Love and Blessings.