I found a few sources that all have roughly the same ratio: Clenbuterol 40mcg, Yohimbine 5mg, Benzyl Alcohol 2%; Clenbuterol 80mcg, Yohimbine 10.8mg

Could a product perhaps be developed similar to the old "Helios"? An injectable form of a mixture of clenbuterol and yohimbine? The advantage of this product could be faster availability and prevent the heartburn caused by clen.