If your talking about BL, it is a test prop/test phenylprop combo. Not suspension. I wasn't sure, but wanted to correct your question if so.
And, yes, it can be done. If you bought the two separate, you could certainly mix the two together, to get one. What BL product allow, is for you to have it all in 1ml rather than 2ml. So, ya get 100mg prop, 100mg phenylprop in 1ml (10ml)
Regards!
BL