Aug 09 2015 nbsp 0183 32 Contents1 What is Andarine 1 1 Medical Studies1 2 Athletic uses1 3 How it Works1 4 Stacking2 Side Effects3 Half life4 Dosage and use5 Where to buy Andarine What is Andarine Andarine S4 was developed by GTX Inc for the treatment of muscle wasting osteoporosis and BPH enlargement of the prostate It belongs to the class of drugs called SARM s – selective androgen