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 . 
The decline in both female and male libido can be linked to the decline in secretion of HGH in the body. Sexual potency and HGH levels are high in puberty, however diminishes throughout as you percent of men have erection problems as they approach 80 years. A clinical study conducted of about 300 ageing adults proved that HGH treatment boosted sexual potency in about 75 percent of men. Furthermore, interviews conducted on people using HGH therapy to slow down aging process indicate both men & women experienced improvement in sexual function and libido.
Also, medical advice should be sought if the person has previously suffered heart attack, has a disease of the blood vessels or the heart, has high cholesterol levels in the blood, has clotting or excess bleeding problems, or has diabetes, kidney, or liver diseases. If the person has one or more of these problems, then an alteration of the dosage may be required. Medicines that can react with Winstrol are blood thinners or anticoagulants, diabetes medication, and insulin. Care should be taken while administering Winstrol with any of these medicines.