Testosterone Mix 250 10ml vial, 250mg/ml (Swiss Pharm). Sustex M250 has been sold in Europe for many years and has been the most popular testosterone used by European athletes for a long time. It has shown to be very effective with many things going for it. To start with it is more effective at lower dosages. For most users of domestics like Cypionate and Enanthate, the drugs tend to require increased dosage each time they are used to provide the user with good results. Eventually many find themselves using 1200 mg per week or more to get results. Sustanon’s primary advantage is that it has been effective in continued use or return use at a reasonable dosage.