Can You Take Xarelto With Viagra or Cialis?
Xarelto is not known to interact directly with Viagra or Cialis, but the heart conditions and nitrate medicines that often accompany it mean a doctor should approve the combination.
Viagra and Cialis are not known to interact directly with Xarelto, the blood thinner also called rivaroxaban, and many men take an ED medicine alongside an anticoagulant without a problem. But "no listed interaction" is not the whole story when blood thinners are involved, and this combination genuinely warrants a doctor's input rather than a self-assessment. This guide explains what is and is not known, and what to watch for.
Can you take Xarelto with Viagra or Cialis?
Standard interaction checkers do not flag a direct clash between rivaroxaban (Xarelto) and the PDE5 inhibitors sildenafil (Viagra) or tadalafil (Cialis). They work on different systems: Xarelto prevents blood clots by interfering with the clotting cascade, while Viagra and Cialis support blood flow into the penis during arousal. On paper, that means they can usually be combined. In practice, the men prescribed Xarelto are often the same men who need to be cautious with ED drugs for other reasons — heart disease, high blood pressure, or the heart medicines they also take.
The reason this question matters is overlap of risk rather than a head-to-head interaction. Both drug types can have a modest effect on blood pressure and circulation, and the conditions that lead to a Xarelto prescription frequently come with cardiovascular precautions of their own. That is why the safe path is to let the doctor who manages your anticoagulant know before you start an ED medicine.
| Medication | Type | Main purpose | Key caution |
|---|---|---|---|
| Xarelto (rivaroxaban) | Anticoagulant (blood thinner) | Prevent and treat blood clots | Raised bleeding risk |
| Viagra (sildenafil) | PDE5 inhibitor | Erectile dysfunction | Never combine with nitrates |
| Cialis (tadalafil) | PDE5 inhibitor | Erectile dysfunction | Longer-acting; never with nitrates |
The real risk: nitrates, not the blood thinner
The most dangerous combination in this whole area is not Xarelto at all — it is nitrates. Men on Xarelto for heart disease are often also prescribed nitrate medicines such as nitroglycerin or isosorbide for chest pain. Nitrates and PDE5 inhibitors together can cause a sudden, severe drop in blood pressure that may be life-threatening. So the critical question is not only "am I on a blood thinner?" but "am I also on a nitrate?" The full list of dangerous pairings is covered in our guide to medications you should not take with sildenafil.
There is also a practical reason to keep the prescribing doctors in the loop: men on Xarelto are usually being treated for a serious condition such as a clot, atrial fibrillation or recent surgery, and stopping or skipping the anticoagulant to "make room" for an ED drug is dangerous. The blood thinner is doing an important job. The aim is to add ED treatment safely on top of it, not to trade one for the other — which is exactly the kind of judgement a clinician who knows your full history is best placed to make.
What symptoms should prompt a call to your doctor?
If you have been cleared to use Viagra or Cialis alongside Xarelto, stay alert to signs that warrant medical attention, since anticoagulants raise bleeding risk and ED drugs can lower blood pressure.
- Unusual bruising, nosebleeds, or bleeding gums
- Blood in urine or stool, or black, tarry stools
- Dizziness, fainting, or lightheadedness suggesting low blood pressure
- Chest pain, an irregular heartbeat, or breathlessness
- An erection lasting more than four hours (seek urgent care)
Cialis versus Viagra when you take a blood thinner
Neither Viagra nor Cialis has a recognised interaction with Xarelto, so the choice between them usually comes down to timing rather than the blood thinner. Viagra (sildenafil) is shorter-acting and taken before sex; Cialis (tadalafil) lasts much longer and can be taken in a lower daily dose. Whichever you choose, the same precautions apply — and if you are weighing health conditions in the decision, read taking Viagra with a heart condition. If finasteride or other regular medicines are also in the mix, our note on Viagra with finasteride or Propecia covers how to keep your clinician informed.
Frequently asked questions
- Is there a direct interaction between Xarelto and Viagra?
- No direct interaction is listed between rivaroxaban and sildenafil. The caution comes from the heart conditions and other medicines that often accompany a Xarelto prescription, so a doctor should still sign it off.
- Can Xarelto and Cialis be taken together?
- They are not known to interact, and the choice between Cialis and Viagra is usually about how long you want the effect to last. Confirm with the doctor managing your anticoagulant first.
- What is the most important thing to avoid?
- Nitrate medicines. Combining a nitrate with Viagra or Cialis can cause a dangerous blood-pressure drop, which is a far greater concern than the blood thinner itself.
For the full set of Viagra safety and interaction guides, return to our erectile dysfunction and Viagra hub.