Differential Diagnosis

The patient is experiencing symptoms that may be related to their medication regimen, which includes amlodipine, Reneron (possibly a misspelling or confusion with a different medication, as there isn't a well-known medication by this name; it might be intended to refer to a medication like Ranexa or another), and Requip. Given the medications mentioned, we can consider the following differential diagnoses:

• Single Most Likely Diagnosis
  • Orthostatic hypotension: Amlodipine, a calcium channel blocker, can cause peripheral vasodilation leading to hypotension. Requip (ropinirole), used for Parkinson's disease and restless legs syndrome, can also cause orthostatic hypotension as a side effect. This combination could exacerbate the risk of orthostatic hypotension.
• Other Likely Diagnoses
  • Edema: Amlodipine is known to cause peripheral edema in some patients. While not directly related to the question of "this" symptom, it's a common side effect of the medication.
  • Dizziness or lightheadedness: Both amlodipine and Requip can cause dizziness or lightheadedness, which might be what the patient is experiencing.
• Do Not Miss Diagnoses
  • Hypotensive crisis: Although less likely, the combination of medications that can lower blood pressure (like amlodipine) could potentially lead to a hypotensive crisis, especially if the patient is also taking other medications that lower blood pressure or has dehydration.
  • Serotonin syndrome (if "Renoron" is a misspelling for a serotonin-affecting drug): If the patient is on a medication that affects serotonin levels (which is not clear from "Renoron" but considering the possibility of a medication error or confusion), the combination with other medications could potentially lead to serotonin syndrome, a life-threatening condition.
• Rare Diagnoses
  • Amlodipine-induced gingival hyperplasia or other rare side effects: While amlodipine is more commonly associated with edema and hypotension, rare side effects could be considered if common causes are ruled out.
  • Requip-induced compulsive behaviors: Requip can rarely cause compulsive behaviors, which might not be directly related to the physical symptoms implied but is a notable rare side effect.

Given the information provided, the exact nature of "this" symptom is unclear, which makes it challenging to provide a precise differential diagnosis. However, considering the medications involved, orthostatic hypotension and other related symptoms seem to be the most plausible explanations.