Dr. Jekyll wakes up one day as Mr. Hyde without drinking the drug, which really worries him.
Falling action 2
Dr. Jekyll starts becoming Hyde more frequently and it takes a bigger dose every time to go back to normal.
Possible resolution 1
Dr. Jekyll asks Lanyon for help to get back to normal, but there is nothing he can do.
Possible resolution 2
Dr. Jekyll starts worrying about becoming Hyde forever and never being able to be Henry Jekyll again. Also, he worries about being caught by the police as Hyde.
Dr. Jekyll fully becomes Hyde and gets caught by Mr. Utterson and the police.
Dr. Jekyll fully transforms into Hyde and he commits suicide before the police finds him.