Colchicine and Tipranavir: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 2, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Tipranavir
Colchicine
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Let's talk about taking colchicine (for gout or familial Mediterranean fever) together with tipranavir (Aptivus), which is boosted with ritonavir for HIV. Tipranavir slows down the liver enzyme that normally clears colchicine out of your body. That means colchicine can build up to dangerously high levels, even at normal doses.
Colchicine toxicity is serious. It can cause severe diarrhea, muscle weakness, and problems with your blood cells, and in some cases it has been fatal. Please don't stop either medicine on your own. Instead, reach out to your pharmacist or doctor. They can decide whether the dose needs adjusting or whether a different plan is safer for you.
Interaction: Ritonavir-boosted tipranavir is a strong CYP3A4 (and P-gp) inhibitor. Colchicine is a CYP3A4/P-gp substrate, so co-administration reduces colchicine clearance, increasing exposure and risk of life-threatening or fatal toxicity.
Direction: Increased colchicine effect/toxicity. Evidence: theoretical/mechanistic, but consistent with fatal case reports for strong 3A4 inhibitors. Onset: unspecified.
- Contraindicated in any patient with renal or hepatic impairment.
- In normal renal/hepatic function, dose reduction is required (concurrent use or within prior 14 days).
- Gout flare: 0.6 mg once, then 0.3 mg 1 hr later; do not repeat before 3 days.
- Gout prophylaxis: halve dose (0.6 mg BID to 0.3 mg daily; 0.6 mg daily to 0.3 mg QOD).
- FMF: max 0.6 mg/day.
- Monitor for GI, myotoxicity, myelosuppression.
What happens
Increased colchicine exposure and an increased risk of colchicine toxicity
Interaction Deep Dive
Taking colchicine together with a strong CYP3A4 inhibitor is contraindicated, since colchicine toxicity that is life-threatening and fatal has been documented in such patients even when colchicine is used at therapeutic doses1. In patients who have renal or hepatic impairment, the combined use of colchicine with a strong CYP3A4 inhibitor (which includes every protease inhibitor apart from fosamprenavir) is likewise contraindicated. For patients whose renal and hepatic function is normal and who are concurrently taking a strong CYP3A4 inhibitor (for example, ritonavir-boosted tipranavir), or who have taken one within the preceding 14 days, the colchicine dose must be adjusted. When treating a gout flare, cut the colchicine dose to a single 0.6 mg tablet, then 0.3 mg (half a tablet) one hour afterward, and do not repeat this dose sooner than 3 days. For gout flare prophylaxis, lower the colchicine dose from an initial 0.6 mg twice daily to 0.3 mg once daily, or from an initial 0.6 mg once daily to 0.3 mg every other day. For managing familial Mediterranean fever, the colchicine dose should not exceed a maximum of 0.6 mg per day (which may be administered as 0.3 mg twice daily) 2.
Why it happens (mechanism)
Inhibition of CYP3A4-mediated colchicine metabolism by ritonavir-boosted tipranavir
How to manage this interaction
This combination is taken seriously because colchicine can build up to harmful levels when tipranavir is on board. Here is how care teams typically handle it:
- If you have kidney or liver problems, this pairing is generally avoided altogether.
- If your kidney and liver function are normal, your colchicine dose will usually be lowered and individualized by your care team, whether it is for a gout flare, gout prevention, or familial Mediterranean fever.
- The lower dose may also apply if you took tipranavir within the last 14 days.
What to do: Keep taking both exactly as prescribed and do not adjust anything yourself. Ask your pharmacist or prescriber to review your colchicine dose, and report any severe diarrhea, muscle weakness, numbness, or unusual bruising right away.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
1 report — tap to read
a) While the interaction between colchicine and ritonavir-boosted tipranavir has not been formally investigated, an interaction between colchicine and clarithromycin, a potent CYP3A4 inhibitor, produced fatal colchicine toxicity. Colchicine Cmax and AUC rose by 227.2% and 281.5%, respectively, when a single 0.6 mg dose of colchicine was given to patients (n=23) who were receiving clarithromycin 250 mg twice daily for 7 days 2.
Common questions
Can I take Colchicine and Tipranavir together?
Tipranavir can push colchicine to toxic, potentially fatal levels, so this pairing is contraindicated in anyone with kidney or liver impairment and requires a lowered, carefully individualized colchicine dose in everyone else. Talk to your pharmacist or doctor before combining them. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Colchicine and Tipranavir interaction?
It is rated contraindicated. These should generally not be used together.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Colchicine and Tipranavir interaction managed?
This combination is taken seriously because colchicine can build up to harmful levels when tipranavir is on board. Here is how care teams typically handle it: If you have kidney or liver problems, this pairing is generally avoided altogether. If your kidney and liver function are normal, your colchicine dose will usually be lowered and individualized by your care team, whether it is for a gout fla… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Colchicine or Tipranavir need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (2)
Keep reading about Tipranavir
Keep reading about Colchicine
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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