The most commonly used AAS in medicine are testosterone and its various esters (but most commonly testosterone undecanoate , testosterone enanthate , testosterone cypionate , and testosterone propionate ),  nandrolone esters (most commonly nandrolone decanoate and nandrolone phenylpropionate ), stanozolol , and metandienone (methandrostenolone).  Others also available and used commonly but to a lesser extent include methyltestosterone , oxandrolone , mesterolone , and oxymetholone , as well as drostanolone propionate , metenolone (methylandrostenolone), and fluoxymesterone .  Dihydrotestosterone (DHT; androstanolone, stanolone) and its esters are also notable, although they are not widely used in medicine.  Boldenone undecylenate and trenbolone acetate are used in veterinary medicine . 
Some bodybuilders and athletes use trenbolone for its muscle-building and otherwise performance-enhancing effects. [ citation needed ] Such use is illegal in the United States and many other countries. The DEA classifies trenbolone as a Schedule III controlled substance under the Controlled Substances Act .  Trenbolone is classified as a Schedule 4 drug in Canada  and a class C drug with no penalty for personal use or possession in the United Kingdom .  Use or possession of steroids without a prescription is a crime in Australia .  The infamous "duchess" cocktail administered to Russian athletes at the Sochi Winter Olympics consisted of oxandrolone , metenolone , and trenbolone. 
That is a horrible experience and I know it all too well. Mine may have been less severe than yours, but it was probably the most painful thing I have EVER experienced. Last October, I was in the hospital & I was kinda freaking out a little, so they involuntarily gave me Haldol to relieve some of my anxiety. Mind you, I was 5 months pregnant at this time. I’ve taken it b4 & had issues, but never this severe. If I take benadryl or cogentin w/it, I’m usually fine. It all started w/ a stiff neck & then back. Then my face began to tighten & i had involuntary spasms of the face. My neck was so tight that I experienced the same thing as you… my neck was turned completely sideways & trying to go toward the back of my shoulder as well. They did not want to give me either cogentin or benadryl b/c of the pregnancy. It progreased very quickly & I was crying in agony. They thought I was faking it up until they finally gave me some cogentin thru my IV & I had complete relief in less than 5-10 minutes. However, my muscles in my neck & back were very fatigued after that. I never want to go thru that EVER again & I now list haldol as an allergy on all my medical records.