This is the 15526th most frequent Russian word.
препаратом
The Russian word "препаратом" means "preparation" or "substance" (e.g., a medicinal or chemical preparation) in its instrumental case form.
Here, 'препаратом' is used in instrumental case to indicate the means of treatment.
Доктор назначил мне лечение этим препаратом.
The doctor prescribed me treatment with this medication.
In this context, 'препаратом' refers to a substance or chemical.
Для эксперимента мы пользовались этим препаратом.
We used this preparation for the experiment.
Here, 'препаратом' is used to denote a pharmaceutical product being developed.