Can Amlodipine Cause Hypopigmentation?
No, amlodipine causes hyperpigmentation, not hypopigmentation. The documented dermatologic adverse effect is increased pigmentation in sun-exposed areas, not loss of pigmentation.
Evidence of Amlodipine-Induced Hyperpigmentation
A case report documented oral mucosal and cutaneous hyperpigmentation developing one year after starting amlodipine, with progressive darkening over time 1. The hyperpigmentation was most prominent on photoexposed areas, though the patient had no history of photosensitivity, pruritus, or flushing. This represents the opposite of hypopigmentation—it is an increase in skin pigmentation.
Other Documented Dermatologic Effects
Beyond hyperpigmentation, amlodipine has been associated with several other cutaneous reactions:
- Petechial rash: A brownish-black, non-blanching macular rash affecting the lower limbs, which resolved completely within 8 weeks of drug discontinuation 2
- Stasis dermatitis: Patients on amlodipine are significantly more likely to develop stasis dermatitis compared to age-matched controls (19% vs 5%, p<0.02), likely related to the drug's propensity to cause lower extremity edema 3
- B-cell pseudolymphoma: Rare benign lymphoid proliferative disorder presenting as itchy papules and nodules, which regressed after amlodipine discontinuation 4
Clinical Implications
If a patient on amlodipine develops:
- Darkening of skin (especially sun-exposed areas): Consider amlodipine-induced hyperpigmentation
- Loss of pigmentation (hypopigmentation): Look for alternative causes unrelated to amlodipine, such as vitiligo, post-inflammatory changes, or other medications
The FDA drug label for amlodipine does not list hypopigmentation as a known adverse effect 5. The primary dermatologic concern remains peripheral edema (the most common side effect), with rare reports of pigmentary changes being in the direction of increased pigmentation, not decreased.