If it's the actual parabolan ester, hexahydrobenzylcarbonate, and JUST that ester, you can inject 2x per week. I'd say 3-400mg/week would be a good starting dose. That would be about like 50mg/ed of tren acetate, though slightly less actual tren, and slightly higher eventual blood levels. If you have the BD Trinabol, with 3 esters, you'd need to inject it probably eod since it has tren acetate in it. That would be harder to break up. You could do that 2x per week as well, you would just experience a bit more fluctuations in blood levels due to the acetate in it. If it's the parabolan ester, or tren enanthate, either of those are longer esters and will be fine 2x per week, 3-400mg/week.