Jack experienced a series of health issues after starting new medications from different doctors. What has he encountered?

Jack has encountered a prescribing cascade, which occurs when a patient develops side effects from a medication, leading to the prescription of additional medications to address those side effects. This often creates a cycle where each new medication is prescribed to counteract the effects of the previous one, potentially resulting in more health issues and a complicated treatment regimen. In Jack's case, the series of health issues he experienced after starting new medications suggests that instead of resolving his initial health concerns, the prescriptions may have introduced new problems that required further medical intervention.

Options like an allergic reaction, while potentially a concern with new medications, specifically refer to an immune response to a substance, rather than a series of medication-induced complications. Polypharmacy problems focus on the issues arising from the concurrent use of multiple medications, which frequently overlap with the concept of a prescribing cascade but do not specifically emphasize the complication arising from treating side effects. Drug resistance, typically associated with the ineffectiveness of certain medications, such as antibiotics, does not apply here as Jack's issues are rooted in the complexity of his medication regimen rather than a resistance phenomenon.