Colchicine is an anti-inflammatory medication used primarily to treat gout, pericarditis, and a genetic condition called Familial Mediterranean Fever. In 2023, the FDA also approved a low-dose version specifically to reduce heart attack and stroke risk in people with established cardiovascular disease. It works differently from typical painkillers, targeting the inflammatory process itself rather than blocking pain signals.
How Colchicine Works
Colchicine binds to a protein called tubulin, which cells use to build tiny structural tubes involved in many functions, including the movement of white blood cells toward inflamed tissue. By disrupting the assembly of these tubes, colchicine slows down the immune cells that drive inflammation. This is why it’s effective across several seemingly unrelated conditions: gout, heart disease, and pericarditis all involve inflammatory pathways that colchicine can dampen.
It starts working within about 30 minutes to 2 hours of taking a dose, though noticeable pain relief from a gout flare often takes a day or two.
Gout Flares
Gout is the most well-known reason people take colchicine. During an acute flare, uric acid crystals in a joint trigger intense inflammation, usually in the big toe, ankle, or knee. Colchicine helps by reducing the inflammatory response to those crystals.
For an active gout attack, the standard approach is to take a higher initial dose at the first sign of a flare, followed by a smaller dose one hour later, for a total of 1.8 mg over that first hour. Timing matters: the earlier you take it after symptoms begin, the more effective it is. Waiting even a day or two significantly reduces its benefit.
Colchicine is also used at a lower daily dose to prevent gout flares from happening in the first place, particularly when someone is starting a uric acid-lowering medication. Those drugs can paradoxically trigger flares in the early weeks, so colchicine acts as a bridge during that transition.
Pericarditis
Pericarditis is inflammation of the thin sac surrounding the heart. It causes sharp chest pain that often worsens when lying down or breathing deeply. The condition tends to come back: without colchicine, roughly a third of people with a first episode experience a recurrence.
Colchicine paired with a standard anti-inflammatory dramatically changes those odds. In the COPE trial, recurrence dropped from 32% with aspirin alone to about 11% when colchicine was added. For people who already have recurring pericarditis, the numbers are even more striking. The CORP trial found recurrence rates of 24% with colchicine compared to 55% with placebo.
Treatment for a first episode typically lasts up to three months. For recurrent pericarditis, it extends to about six months. It’s now standard practice to include colchicine alongside an anti-inflammatory drug as first-line treatment for both acute and recurrent episodes.
Familial Mediterranean Fever
Familial Mediterranean Fever (FMF) is a genetic condition that causes recurring episodes of fever and painful inflammation in the abdomen, chest, or joints. It most commonly affects people of Mediterranean descent, including those with Turkish, Armenian, Arab, and Sephardic Jewish ancestry.
Colchicine is the cornerstone treatment for FMF and is taken daily on an ongoing basis to prevent attacks. Adults typically take 1.2 to 2.4 mg per day. Children can also be treated, with doses adjusted by age: children aged 4 to 6 may take 0.3 to 1.8 mg daily, those 6 to 12 take 0.9 to 1.8 mg, and adolescents over 12 use the same range as adults. Long-term use in FMF also helps prevent a serious complication called amyloidosis, where inflammatory proteins gradually deposit in the kidneys and other organs.
Cardiovascular Disease Prevention
The newest approved use for colchicine targets heart disease. In June 2023, the FDA approved a 0.5 mg once-daily formulation to reduce the risk of heart attack, stroke, and cardiovascular death in adults with established atherosclerotic disease or multiple risk factors. This was a significant development because it recognized, for the first time in an FDA-approved drug, that targeting chronic low-grade inflammation in blood vessels can prevent cardiac events, separate from cholesterol lowering or blood pressure control.
This use reflects a growing understanding that atherosclerosis (the buildup of plaques in arteries) is fundamentally an inflammatory process. Colchicine at this low dose doesn’t replace statins or blood pressure medications. It’s used alongside them as an additional layer of protection.
Common Side Effects
The most frequent side effects are gastrointestinal: diarrhea, nausea, vomiting, and abdominal cramping. These are dose-dependent, meaning they’re more likely at higher doses and often improve when the dose is reduced. Diarrhea is sometimes the first sign that the dose is too high.
With long-term use, colchicine can occasionally cause muscle weakness or pain, a condition called neuromuscular toxicity. This risk increases when colchicine is combined with statin medications or fibrates, which independently carry a similar risk. If you develop unexplained muscle pain while taking colchicine, that warrants a conversation with your prescriber.
Important Drug Interactions
Colchicine is broken down in the body through two pathways, and drugs that block either one can cause colchicine to build up to dangerous levels. The antibiotic clarithromycin blocks both pathways simultaneously, and fatal interactions have been reported. Other medications that interfere with colchicine processing include erythromycin, cyclosporine, verapamil (a blood pressure drug), and even grapefruit juice.
People with kidney or liver problems face the highest risk from these interactions. In those patients, combining colchicine with drugs that block its breakdown has resulted in life-threatening toxicity even at normal therapeutic doses. Kidney function also affects how quickly the body clears colchicine on its own. People with severely reduced kidney function need lower doses, and those on dialysis may only take it a couple of times per week rather than daily.
If you’re prescribed colchicine, make sure your prescriber and pharmacist know every medication you take, including over-the-counter drugs and supplements. The interaction risk is real and preventable with proper dose adjustments.