When You Can't Get Paxlovid, What Are Your Options?

Your doctor prescribed Paxlovid (Nirmatrelvir/Ritonavir) for your COVID-19 infection, but you can't fill the prescription. Maybe the pharmacy is out of stock, maybe your insurance won't cover it, or maybe you take a medication that interacts with it. Whatever the reason, you need to know: what else is out there?

The good news is that Paxlovid isn't the only treatment for COVID-19. In this article, we'll cover what Paxlovid is, how it works, and walk you through the real alternatives your doctor might consider.

What Is Paxlovid?

Paxlovid is an oral antiviral medication made by Pfizer. It comes as a dose pack containing two active ingredients:

• Nirmatrelvir (150 mg tablets) — a protease inhibitor that blocks the SARS-CoV-2 virus from copying itself
• Ritonavir (100 mg tablets) — a pharmacokinetic booster that slows the breakdown of Nirmatrelvir so it stays active longer in your body

The standard dose is two Nirmatrelvir tablets (300 mg total) plus one Ritonavir tablet (100 mg), taken together twice daily for five days. It's approved for adults at high risk of severe COVID-19 and should be started within five days of symptom onset.

How Does Paxlovid Work?

Paxlovid targets the main protease enzyme (called Mpro or 3CLpro) that the SARS-CoV-2 virus needs to process its proteins and replicate. By blocking this enzyme, Nirmatrelvir prevents the virus from making functional copies of itself, giving your immune system time to clear the infection.

Ritonavir doesn't fight the virus directly. Instead, it inhibits a liver enzyme (CYP3A4) that would normally break down Nirmatrelvir too quickly. This "boosting" effect is also why Paxlovid has so many drug interactions — the same CYP3A4 enzyme processes many other medications.

Alternative #1: Molnupiravir (Lagevrio)

Molnupiravir, sold under the brand name Lagevrio, is an oral antiviral made by Merck. Like Paxlovid, it's taken as a pill at home and is prescribed for mild-to-moderate COVID-19 in high-risk adults.

How it works: Molnupiravir takes a different approach than Paxlovid. Instead of blocking a protease, it gets incorporated into the virus's genetic material during replication and introduces errors (mutations) that prevent the virus from functioning. This is called "lethal mutagenesis."

Key differences from Paxlovid:

• Generally considered less effective than Paxlovid at preventing hospitalization and death
• Fewer drug interactions — a major advantage for patients on complex medication regimens
• Not recommended during pregnancy due to potential effects on fetal development
• Taken as four 200 mg capsules twice daily for five days
• Cash price is approximately $500–$700 per course

Molnupiravir may be a good option if you can't take Paxlovid due to drug interactions, particularly if you're on medications like certain statins, immunosuppressants, or blood thinners.

Alternative #2: Remdesivir (Veklury)

Remdesivir, brand name Veklury, is an intravenous (IV) antiviral made by Gilead Sciences. While it was originally used primarily for hospitalized COVID-19 patients, it's also approved for outpatient use in high-risk adults and pediatric patients.

How it works: Remdesivir is a nucleotide analog that interferes with the virus's RNA-dependent RNA polymerase — the enzyme responsible for copying the viral genome. It essentially tricks the virus into using a defective building block, which halts replication.

Key differences from Paxlovid:

• Requires IV infusion — must be administered at a clinic, hospital, or infusion center
• Given as a 3-day course for outpatients (once-daily infusions)
• Fewer drug interactions than Paxlovid
• Can be used in pediatric patients (≥28 days old and ≥3 kg)
• Cost is approximately $2,000–$3,000 for a 3-day course

Remdesivir is a solid option if you can access an infusion center and need a treatment with fewer drug interaction concerns. The downside is the inconvenience of three separate infusion visits.

Alternative #3: Monoclonal Antibody Treatments

Monoclonal antibody therapies have been part of the COVID-19 treatment toolkit since 2020. These lab-made antibodies target the spike protein on the surface of the SARS-CoV-2 virus, helping your immune system neutralize it more effectively.

Important caveat: The effectiveness of monoclonal antibodies depends heavily on the circulating variant. Several previously authorized options (such as Sotrovimab and Bebtelovimab) have had their authorizations revised or revoked as new variants emerged that were resistant to them. As of 2026, the availability of effective monoclonal antibodies depends on current variant surveillance data.

Key differences from Paxlovid:

• Administered by IV infusion or injection
• Effectiveness varies by COVID-19 variant
• Limited availability and access compared to oral antivirals
• May be an option for immunocompromised patients who need passive immunity support

Ask your doctor about currently authorized monoclonal antibody options if neither Paxlovid nor the alternatives above are suitable for your situation.

Alternative #4: Supportive Care and Monitoring

Not every COVID-19 case requires antiviral treatment. For some patients — even those at higher risk — close monitoring and supportive care may be appropriate, especially if:

• More than five days have passed since symptom onset (outside the treatment window for antivirals)
• Symptoms are mild and not progressing
• Drug interactions or contraindications rule out all antiviral options

Supportive care includes rest, hydration, fever management with acetaminophen or ibuprofen, and close monitoring for warning signs of worsening illness (such as difficulty breathing, persistent chest pain, or confusion).

Final Thoughts

Paxlovid is a highly effective treatment for COVID-19, but it's not the only option. If you can't get or take Paxlovid, Molnupiravir and Remdesivir are established alternatives with different pros and cons. The best choice depends on your specific health situation, other medications, and access to care.

Talk to your doctor about which alternative makes the most sense for you. And if the issue is simply finding Paxlovid in stock, try Medfinder to check real-time pharmacy availability — you may be able to locate it at a nearby pharmacy. Check our guide to finding Paxlovid in stock for more tips.