Participants are adult patients (aged 18 years or older)
Diagnosed with lung, colorectal, breast, or prostate cancer
Are currently receiving active cancer treatments
Are self-managing one or more prescribed cancer medications
Participants must have access to technology devices (smartphone, tablet, computer) to track their experiences or concerns about medication safety events, or their family members can help them access technology devices to track the events or concerns
Speaks and reads English or has a support person (family member or friend) who can assist
You may not be if
Can't access technology or do not use technology
Do not have access to the internet
Do not speak or read English
Not permitted to participate by their health care providers
