Based on what was shown in the movie, there should not be any resulting complications if this chromosome-altering substance was injected into a person without inherent violent genetics.
When the protagonist of the movie was injected with the C24 after sustaining gruesome injuries, he only passed out for several hours. By the time he woke up again, not only were his wounds healed but he had also mutated into a powerful fighter that could wipe out a pack of aliens all on his own.
This same thing happened with Saoun after he was injected with the C24 as he fainted without a word.
After that, large beads of sweat began trickling down his forehead. Judging by his brows that were sewn together, he must have been experiencing great pain.
"The blood pressure of the experiment subject is rising..."
"His heartbeat is increasing, currently at 85 beats per minute. No, it's 95 and it's still rising...!"