What other factors do you consider besides money when determining the trial duration?

When designing a trial, the scientists involved will examine the natural progression of a condition.

They will look at how quickly the condition is expected to progress, how rapidly symptoms are likely to emerge, and how soon they anticipate their drug will take effect. For instance, if a condition progresses very slowly over time, it will take longer to determine whether there's a noticeable change with the drug compared to a placebo.

If you have a condition that progresses rapidly with significant symptoms, it may be necessary to evaluate the drug's effectiveness in a shorter time frame. The duration of the trial also depends on the expected safety data. Safety trials usually run for a longer period of time.

Researchers need to understand the potential long-term effects that people might experience. They are trying to determine whether a treatment is both effective and safe, and this depends on the nature of the drug. It's not a straightforward process.