It’s not known for sure if using drugs similar to Spiriva can increase your risk for dementia.
One study looked at 58,769 people diagnosed with dementia who had taken anticholinergic agents earlier in their life. (Spiriva belongs to the class of drugs called anticholinergic agents.)
This study didn’t determine whether the anticholinergic drugs caused the people’s dementia. However, the use of anticholinergics was associated with higher risk for dementia, especially in middle-aged and older adults.
More research is needed to know whether using anticholinergic drugs, such as Spiriva, can increase the risk for dementia later in life.