Whether insulin can be used without putting it in the refrigerator depends on the situation, insulin that has been unsealed can still be used, but unsealed insulin may not be able to be used, you need to ask your doctor for details.
For insulin that has been unsealed, the general preservation temperature is below 25 degrees room temperature can be, do not need to put in the refrigerator, so if the insulin that has been opened if the room temperature is not particularly high, did not put in the refrigerator can still be used, generally unsealed can be used for about 1 month. It is also important to note that storage of unopened insulin must avoid high temperatures and excessive light.
For insulin that needs to be stored for a long time or unopened, it needs to be placed in a refrigerator at 2 to 8 degrees Celsius, otherwise it will affect the efficacy of insulin, so unopened insulin not put in the refrigerator generally can not be used.
Insulin should be used and stored properly under the guidance of a doctor, and should not be used on its own to avoid serious adverse consequences.