Several widely prescribed medications can darken the skin around the eyes, either by depositing pigment directly, triggering melanin production, or causing fluid buildup and inflammation that makes the under-eye area look bruised or shadowed. The list spans glaucoma drops, certain antibiotics, antimalarials, heart-rhythm drugs, hormonal therapies, and even some cancer treatments. In many cases the discoloration fades after stopping the medication, but not always, and the mechanism differs enough from one drug class to another that it is worth understanding what is actually happening under the skin.
Prostaglandin Analog Eye Drops
If you use prescription eye drops for glaucoma or ocular hypertension, this is probably the most common drug-related cause of periorbital darkening. Prostaglandin analogs such as latanoprost, bimatoprost, and travoprost stimulate melanin production in the skin around the eyelids. A case report in a patient using latanoprost documented bilateral eyelid pigmentation appearing about four months after starting the drug, with the darkening gradually fading over several months once the drops were stopped.1American Journal of Ophthalmology. Increased eyelid pigmentation associated with use of latanoprost Beyond simple pigmentation, these drops can cause a constellation of changes around the eye socket known as prostaglandin-associated periorbitopathy. That includes eyelid redness, loss of orbital fat, a hollowed-out look in the upper eyelid, and the eye appearing to sit deeper in its socket.2PubMed. Unilateral Prostaglandin-Associated Periorbitopathy: A Syndrome Involving Upper Eyelid Retraction Distinguishable From the Aging Sunken Eyelid All of those changes deepen shadows and make dark circles far more noticeable, even if the skin pigment itself has not changed much.
The effect is especially striking when only one eye is being treated. People using a prostaglandin analog in just one eye sometimes develop obvious asymmetry: a darker, more hollow-looking orbit on the treated side compared to the untreated one. That asymmetry alone often prompts patients to ask their ophthalmologist what is going on. The good news is that most of these changes improve after switching to a different class of glaucoma medication. One study found that deepening of the upper eyelid sulcus improved in the majority of patients within a year of stopping the prostaglandin drops, and several patients also saw partial recovery of lower eyelid fullness.3PubMed Central. Improvement of Prostaglandin-Associated Periorbitopathy after Discontinuing Treatment
Minocycline and Other Tetracycline Antibiotics
Minocycline is a tetracycline antibiotic frequently prescribed for acne, rosacea, and certain infections, sometimes for months or years at a time. Long-term use can deposit blue-black pigment in the skin, the whites of the eyes, and even internal organs. The discoloration tends to favor sun-exposed areas and the face, and the thin, delicate skin around the eyes is particularly vulnerable. One clinical review noted that the pigmentation “may reverse with discontinuation of the medication, but can also be permanent,” and that the exact mechanism remains uncertain, though it appears to involve the drug or its breakdown products binding with melanin and iron in tissues.4PubMed Central. Minocycline-Induced Scleral and Dermal Hyperpigmentation
The discoloration from minocycline can look alarming because of its blue-gray or slate-blue tone, which is very different from the brownish circles most people associate with tiredness. If you have been on minocycline for several months and notice unusual darkening around your eyes or a bluish tint on your face, it is worth bringing it up with your prescriber. Other tetracyclines can occasionally cause similar pigment changes, but minocycline is the one most consistently linked to this side effect in published reports.
Antimalarial Medications
Hydroxychloroquine and chloroquine are used not just for malaria prevention but, more commonly in Western countries, for autoimmune conditions like lupus and rheumatoid arthritis. Both drugs can cause a distinctive blue-gray or slate-gray discoloration of the skin, and the face and the periorbital region are frequently affected. The mechanism involves the drug or its metabolites binding to melanin granules in the upper and lower layers of the skin, essentially embedding themselves in the pigment system.5PubMed Central. Hydroxychloroquine-related skin discoloration This tends to develop after months or years of continuous therapy rather than appearing overnight.
Because hydroxychloroquine use became far more widespread during the COVID-19 pandemic, and because many people with lupus take it for decades, this side effect is not rare in clinical practice. The color is different enough from typical dark circles to sometimes be mistaken for bruising, which can cause unnecessary worry. If you are on long-term hydroxychloroquine and notice a gray or bluish cast developing around your eyes, your rheumatologist or dermatologist can evaluate whether the drug is the likely cause.
Amiodarone
Amiodarone is a potent antiarrhythmic drug used to control serious irregular heart rhythms. Among its many potential side effects is a blue-gray skin discoloration sometimes called “blue man syndrome.” This affects roughly one to three percent of patients and results from the accumulation of chemical compounds in the skin.6PubMed Central. Amiodarone-induced blue man syndrome: a case report The discoloration favors sun-exposed areas, and since the face gets plenty of light, the periorbital region is often among the first places it becomes visible.
Amiodarone-induced skin discoloration is considered benign from a medical standpoint, meaning it does not indicate organ damage on its own. But it can be deeply distressing for patients, particularly because it tends to appear in the most visible parts of the face. Since amiodarone is typically prescribed for life-threatening arrhythmias, switching to an alternative is not always straightforward, which makes this side effect harder to manage than some of the others on this list. Sun protection can help slow the progression, but once the pigment has deposited, it may take many months to years to fade even after the drug is stopped, because amiodarone has an extremely long half-life and lingers in tissues.
Chlorpromazine and Other Antipsychotic Medications
Chlorpromazine, one of the original antipsychotic drugs, has long been known to cause a distinctive blue-gray pigmentation of the skin and eyes with chronic use. This discoloration shares the same general mechanism as amiodarone-induced changes: the drug or its metabolites accumulate in light-exposed skin. The periorbital area is commonly affected. Newer antipsychotics are less frequently associated with skin pigmentation, but chronic use of other antipsychotic compounds has still been listed among the drug classes capable of causing periorbital hyperpigmentation.7PubMed Central. Periorbital Hyperpigmentation: A Study of its Prevalence, Common Causative Factors and its Association with Personal Habits and Other Disorders If you are on a long-term antipsychotic and develop darkening or discoloration around your eyes that you did not have before, mention it to your psychiatrist. It may be the drug, and sometimes a switch to a different medication can help.
Hormonal Medications
Oral contraceptives and hormone replacement therapy can promote darkening of the periorbital skin, likely through the same pathway that causes melasma (the “mask of pregnancy”) in some women. Estrogen and progesterone can stimulate melanocytes, the pigment-producing cells in the skin, and the thin skin around the eyes is responsive to these signals. This drug-induced darkening has been recognized as a contributing factor in periorbital hyperpigmentation alongside other hormonal shifts such as pregnancy and thyroid disorders.7PubMed Central. Periorbital Hyperpigmentation: A Study of its Prevalence, Common Causative Factors and its Association with Personal Habits and Other Disorders
The pattern here is usually brownish rather than the blue-gray of amiodarone or minocycline. It can be tricky to attribute to the pill specifically, because many women starting oral contraceptives are also in the age range where dark circles become more common for structural and lifestyle reasons. But if your under-eye darkening started or worsened noticeably around the same time you began a hormonal medication, there is a plausible connection. Sunscreen and topical lightening agents can help, though the pigmentation sometimes persists as long as the hormonal medication continues.
Targeted Cancer Therapies
Imatinib, a targeted therapy used for chronic myeloid leukemia and certain other cancers, causes periorbital edema (puffiness around the eyes) in a significant fraction of patients. While this is not pigmentation in the traditional sense, persistent swelling around the eyes produces visible dark shadows that function as dark circles for the person looking in the mirror. The leading explanation for the swelling involves the drug’s inhibition of platelet-derived growth factor receptor signaling, which normally helps regulate fluid pressure in the skin. When that signaling is blocked, capillaries become leakier and fluid seeps into the surrounding tissue, particularly around the eyes where the skin is thinnest.8PubMed Central. Periorbital edema secondary to imatinib mesylate
Imatinib-related puffiness is often one of the first things patients notice and one of the side effects that bothers them most cosmetically, even though it is not dangerous. Cool compresses and elevating the head during sleep can help reduce it, but the effect tends to persist as long as the drug is being taken. Given that imatinib can be a life-saving therapy, most oncologists counsel patients to tolerate the cosmetic side effect rather than change treatment.
Eye Drops and Allergic Contact Dermatitis
Not every drug-related dark circle is caused by a medication depositing pigment or shifting fluid. Sometimes the culprit is allergic contact dermatitis from the eye drops themselves, or more precisely from the preservatives in them. One study of patients with allergic eyelid dermatitis found that eye drops were the most common trigger, accounting for over half of cases.9Ophthalmic Plastic & Reconstructive Surgery. Etiology and Management of Allergic Eyelid Dermatitis Chronic low-grade inflammation of the eyelid skin leads to postinflammatory hyperpigmentation, the same process that makes any patch of skin that has been irritated repeatedly turn darker over time.
This mechanism is worth knowing about because it can happen with over-the-counter eye drops, not just prescription medications. Artificial tears, redness-relief drops, and allergy drops all contain preservatives like benzalkonium chloride that some people react to. If your eyelids are persistently red, itchy, or flaky and your under-eye area is getting darker, the drops you are using “for relief” could be the source of the problem. Switching to preservative-free formulations often resolves it.
How to Tell if a Drug Is the Cause
Dark circles are extremely common and usually have nothing to do with medications. Genetics, aging, sleep deprivation, allergies, sun exposure, and plain skin anatomy explain the vast majority of cases. A comprehensive review of periorbital hyperpigmentation identified hereditary factors, postinflammatory pigmentation from conditions like eczema, increased blood vessel visibility, and shadowing from age-related skin laxity as the main drivers.10PubMed Central. Periorbital Hyperpigmentation: A Comprehensive Review So how do you figure out whether your medication is to blame?
A few patterns point toward a drug cause rather than garden-variety dark circles:
- Timing: The darkening started or worsened within weeks to months of beginning a new medication, with no other obvious explanation like worsening allergies or significant sleep loss.
- Color: A blue-gray or slate tone rather than the typical brownish-purple of fatigue or hereditary circles. Blue-gray strongly suggests a drug-deposition mechanism from medications like minocycline, hydroxychloroquine, amiodarone, or chlorpromazine.
- Asymmetry: One-sided darkening, especially if you use a medicated eye drop in only one eye, is a strong clue.
- Associated changes: If the dark circles come with eyelid swelling, itching, redness, or a sunken appearance of the upper lid, those companion symptoms narrow the list of likely causes considerably.
If you suspect your medication, do not stop it on your own, especially for drugs like amiodarone or imatinib that manage serious conditions. Bring it up with the prescribing doctor, who can evaluate whether a switch is feasible and safe.
Does the Darkening Go Away?
Reversibility depends heavily on which drug is responsible and how long it has been used. Prostaglandin analog-related changes are among the most reversible: pigmentation from latanoprost has been documented fading within months of stopping the drops, and the structural changes around the eye socket also tend to improve over the first year off the medication.3PubMed Central. Improvement of Prostaglandin-Associated Periorbitopathy after Discontinuing Treatment Minocycline pigmentation can fade too, but in some patients it persists permanently, particularly after years of use.4PubMed Central. Minocycline-Induced Scleral and Dermal Hyperpigmentation Amiodarone-related discoloration tends to be stubbornly slow to resolve because of the drug’s exceptionally long tissue half-life.
For cases where the darkening does not resolve on its own after the medication is stopped, there are treatment options borrowed from the broader management of periorbital hyperpigmentation. These include topical lightening agents like hydroquinone, azelaic acid, and kojic acid, as well as chemical peels and laser treatments.10PubMed Central. Periorbital Hyperpigmentation: A Comprehensive Review Results vary, and much of the evidence for these treatments comes from research on melasma rather than drug-induced pigmentation specifically, so expectations should be realistic. A dermatologist can help assess what type of pigmentation you are dealing with and which approach, if any, is likely to help.
Gold and Chemotherapy Agents
A few additional medications deserve mention. Gold-based compounds, once widely used for rheumatoid arthritis and still occasionally prescribed, can cause chrysiasis, a permanent blue-gray to purple discoloration of skin that has been exposed to sunlight. The periorbital area is a classic site. This is rare today simply because gold therapy has largely been replaced by newer biologics, but patients who received it years ago may still carry the discoloration. Various chemotherapy drugs have also been reported to cause periorbital darkening, though the specific agents and their frequency are less well characterized in the literature.7PubMed Central. Periorbital Hyperpigmentation: A Study of its Prevalence, Common Causative Factors and its Association with Personal Habits and Other Disorders For cancer patients, dark circles are often far down the list of concerns during treatment, but they can become a quality-of-life issue during survivorship, when people want their face to look like it did before.
Across all of these drug classes, the shared thread is that the periorbital skin is unusually thin and vascular, making it a preferential site for both pigment deposition and fluid accumulation. A drug that causes a subtle color change on the forearm might produce an obvious and distressing change around the eyes. That anatomical vulnerability is why so many pharmacologically unrelated medications end up on the same list.