Pifeltro
Pifeltro (doravirine) is an HIV antiretroviral (ARV) medication. It's only for people who've never taken HIV ARVs or who're currently on HIV ARVs and have a viral load of less than 50 copies/mL. Pifeltro (doravirine) is only taken once a day, but needs to be take in combination with other HIV ARVs. Some common side effects include dizziness, nausea, and headaches.
What is Pifeltro (doravirine)?
What is Pifeltro (doravirine) used for?
- HIV treatment for adults and children (who weigh around 77 lbs or more), in combination with other HIV ARVs
How Pifeltro (doravirine) works
Pifeltro (doravirine) is a non-nucleoside reverse transcriptase inhibitor (NNRTI). It stops an important enzyme (reverse transcriptase), which prevents the HIV virus from making copies of itself and spreading.
Drug facts
| Common Brands | Pifeltro |
|---|---|
| Drug Class | HIV ARV |
| Controlled Substance Classification | Not a controlled medication |
| Generic Status | No lower-cost generic available |
| Availability | Prescription only |
Side effects of Pifeltro (doravirine)
The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
Please note: Pifeltro (doravirine) was taken with other HIV AVRs during clinical trials, so side effects might not all be caused by Pifeltro (doravirine) alone.
- Dizziness (7%)
- Nausea (5-7%)
- Headache (4-6%)
- Extreme tiredness (4-6%)
- Diarrhea (4-6%)
- Strange dreams (1-5%)
- Stomach pain (1-5%)
Less Common Side Effects
- Rash
- Trouble sleeping
- Sleepiness
- Confusion, cloudy thoughts
The following Pifeltro (doravirine) side effects have also been reported
Side effects that you should report to your care team as soon as possible:
- Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
- Infection—fever, chills, cough, or sore throat
- Redness, blistering, peeling, or loosening of the skin, including inside the mouth
Side effects that usually do not require medical attention (report these to your care team if they continue or are bothersome):
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Pros and cons of Pifeltro (doravirine)
Pros
- Convenient, one tablet once a day
- Can be taken with or without food
- Safe for most people with kidney or liver problems
- No weight gain, unlike other HIV ARV drug classes (integrase inhibitors and protease inhibitors)
- Doesn't interact with antacids and acid-lowering medications, unlike some other HIV ARVs like rilpivirine (Edurant)
Cons
- Not a complete regimen, must be taken with other HIV ARVs
- Serious drug interactions that can cause Pifeltro (doravirine) to not work well
- Has a lower barrier of resistance than other HIV ARVs, meaning HIV can become resistant to the medication if doses are missed
- NNRTIs can cause sleep disturbances and psych-related side effects
- Brand only, can be expensive
Pharmacist tips for Pifeltro (doravirine)
- Take Pifeltro (doravirine) at the same time every day. Continue to take this medication and your other HIV ARVs, unless your provider tells you to stop.
- Make sure you get your blood tests drawn regularly, so your provider can see if your HIV ARVs are working safely.
- Some medications, such as rifabutin (Mycobutin), can lower the level of Pifeltro (doravirine) in your body and cause it to not work well. You might need to separate some medications from Pifeltro (doravirine), take a different dose of Pifeltro (doravirine), or avoid taking some medications with Pifeltro (doravirine) altogether. Always talk to your care team before starting any new medication, so they can check for interactions and make adjustments, if needed.
- Make sure you contact your pharmacy to order a refill when you're running low on tablets. Sometimes it can take a little extra time to process refills for high-cost medications like HIV ARVs and you don't want to run out of medication.
- If you have to go to the hospital for any reason, make sure you bring Pifeltro (doravirine) and your other HIV ARVs with you. Not every hospital pharmacy will have these medications available. The staff has special procedures they will follow if they need to administer your own supply of medication, while you're in the hospital.
Risks and warnings for Pifeltro (doravirine)
Pifeltro (doravirine) can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.
Serious drug interactions
- Risk factors: Taking a lot medications
Always make sure your healthcare team has a full list of the medications you're taking, including over-the-counter (OTC) medications and supplements. Don't start taking new medications without talking to your provider or pharmacist. Many medications can interact with Pifeltro (doravirine). Some interactions, such as with carbamazepine (Tegretol), rifampin (Rifadin), and nevirapine (Viramune), lowers Pifeltro (doravirine) levels in your body and cause this medication to not work well.
Immune reconstitution syndrome (inflammation)
- Risk factors: Weakened immune system | Current untreated infection
Pifeltro (doravirine) can cause harmful inflammation in your body as it starts to work. This is because as the medication helps you fight HIV, your immune system starts to recover and becomes more active in fighting other infections. This is good, but can also lead to a lot of inflammation, which can be bad. Your healthcare provider might order labs to check your body for infections before starting your Pifeltro (doravirine), especially if it's your first time taking an HIV ARV. If you do have other infections, you might need to get those treated first before you can start this medication. Call your provider if you experience fever, difficulty breathing, or sudden changes to your health after starting Pifeltro (doravirine).
The inflammation caused by Pifeltro (doravirine) can also lead to autoimmune problems in your body. This can happen months after you start this medication. Let your provider know experience any fever, aches and pains all over your body, extreme tiredness, or rash.
Pifeltro (doravirine) dosage
Tablet| Dosage | Quantity | Price as low as | Price per unit |
|---|---|---|---|
| 100mg of | 30 tablets | $1,712.02 | $57.07 |
Typical dosage for Pifeltro (doravirine)
The typical dose is 100 mg by mouth daily, with or without food.
How much does Pifeltro (doravirine) cost?
$1,712.02
Pifeltro (doravirine) contraindications
Contraindications are specific health conditions or situations in which a person should not take a medication due to safety concerns. If you have any of the following conditions or if any of the following apply to you, let your healthcare provider know because Pifeltro (doravirine) will not be safe for you to take.
- Can't be taken at the same time as medications that stongly affect Pifeltro (doravirine) metabolism, such as the herbal product St. John's wort and some antiseizure and tuberculosis treatment medications
