Follow your doctor's advice, and take your meds. It is not witchcraft. The temporal consequences of taking your meds is that you have a better chance of enjoying the life that God gave you.
Pharmakea were considered in sort of two classes, contraceptives (abortifacients too) and magical potions. Some of the contraceptives were crazy things like crocodile dung extract. Pretty much guaranteed to cause sterility through a rip roaring infection.
You have no problem with medications for mental health, presuming they are well matched to your specific needs. Medical healing is supported by the Church and has been all along. Be sure you have good counseling in there too. As well as good nutrition and getting out into nature when you can.
Indeed, please follow your doctor’s advice. Every reputable Christian church will tell you to follow your doctor’s advice and take your medicine. Pharmakeia in addition to referring to what
@chevyontheriver mentions, also referred to hallucinogenic substances; it did not refer to the small number of beneficial medicines known to ancient Rome via Galen, additionally, St. Paul himself, presumably acting on the suggestion of St. Luke the Evangelist, himself a physician, counseled Timothy to “take a little wine for thy stomach.” Of course now, we have much better treatments for stomach ailments, so again, seek tne advice of doctors.
The Christian Church has always venerated physicians. Ecclesiasticus, also known as the Wisdom of Sirach, one of the most beautiful and edifying books of the Old Testament included in complete copies of the King James Version, contains a section which is read in the Episcopal Church on the Feast of St. Luke, “Honor a Physician.” The early church consisted of many unmercenary healers, as they are called, who provided medical care for free, most notably Saints Cosimas and Damian. And the hospital in its modern form first appeared in Caesarea in Cappodacia (now Turkey), planned and executed using diocesan finances by the beloved fourth century theologian St. Basil the Great, who is also one of the main inspirations for the mythological character of Santa Claus, along with the philanthropic bishop St. Nicholas of Myra, a survivor of torture under Emperor Diocletian who is celebrated for giving purses of gold coins to girls whose families could not afford dowries, and who were thus at risk of being forced into prostitution, and also is famed for slapping Arius, the notorious heretic, at the Council of Nicaea, for which he was deposed, for in the early church clergy regardless of rank were strictly prohibited from hitting people. He was forgiven and reinstated by the bishops a few days later. But it was St. Basil who founded the modern hospital, and his hospital was the first in the world to treat patients regardless of their ability to pay.
Even today there are unmercenary physicians who care for the sick because of their devotion to Christ our God; I know of one who lives in the Gambia in a mostly Muslim village and provides free medical care to the locals, Christian and Muslim alike; he is a licensed doctor, and his practice is funded entirely by donations.
So, not only has the Christian church, including St. Paul, always endorsed legitimate medical care of the sort associated with Hippocrates and Galen, while rejecting as sorcery only those things immoral to Christians, such as psychadelic drugs such as marijuana, quack remedies like alligator tails, and abortifacient substances given to women to terminate their pregnancies.
So please, do what your doctor and pharmacist tell you. If they say take the medicine, take it, and take it according to their instructions (for prescriptions, in the US this is printed on labels affixed to the side of the bottle). This is always the case, but obedience to the instructions of your physician is absolutely critical with any prescription drugs deemed vital for your mental or physical health; if you dislike taking the medicine you have been described, make sure to discuss it with your doctor and get his instructions before you discontinue it, unless you received specific advice from your doctor or pharmacist concerning allergic reactions. But the bottom line is, do what they tell you to do and do not deviate from their instructions unless they change them.
Lastly, I would urge you not to seek out medical advice from random people on the Internet. Only your licensed physicians are qualified to provide advice and treatment.