What is a suitable half-life?

Answer 1

Suitable half-life of a radioactive element or isotope depends upon its uses. For example, a digested, radioisotope such as Iodine 131 requires a short half life so as to be expelled from the body quickly, while Technetium 99m used in industry and machines requires a long half-life to reduce the regularity of replacement.

Answer 2

A suitable half-life for a medication typically depends on its intended use. For most medications, a half-life of 24 hours is considered suitable as it allows for steady levels in the body and once- or twice-daily dosing. However, for some medications that require more frequent dosing or have specific pharmacokinetic considerations, a shorter half-life may be preferred.