A pharmacist is a specialist in dispensing and preparing medications.
Pharmacist
The art or practice of preparing and preserving drugs, and of compounding and dispensing medicines according to prescriptions of physicians; the occupation of an apothecary or a pharmaceutical chemist., A place where medicines are compounded; a drug store; an apothecary's shop.
A skin specialist is a "dermatologist".
Myologist is the term meaning specialist in the study of muscles, but an orthopedist is the typical specialist physician who treats muscle problems.
A vocal specialist is called a Speech Therapist
A neonatologist is a specialist in the care of newborns.
An optometrist is a specialist in vision measurement.
A neonatologist is a specialist in the care of the newborn.
A gerontologist is a specialist in the treatment of the elderly.
Preparing/preparation . How about... preparing? That is the only one I can think of, but it works.
A specialist of a particular subject
-ologist is the combining form meaning specialist.
botanist