Compresse di Paxlovid per la malattia da COVID-19
Revisione paritaria di Sid DajaniUltimo aggiornamento di Michael Stewart, MRPharmSUltimo aggiornamento 19 Gen 2025
Rispetta le linee guida editoriali
- ScaricaScarica
- Condividi
- Language
- Discussione
- Versione audio
- Aggiungi alle fonti preferite su Google
Paxlovid® is a combination of two antiviral medicines. There are two different tablets to take for each dose; two pink tablets and one white tablet.
It is given to adults aged over 18 years when they have tested positive for COVID-19 and have at least one risk factor for developing severe illness.
Treatment should be started as soon as possible after diagnosis of COVID-19 disease and within the first five days of symptoms.
A colpo d'occhio
Paxlovid is an antiviral medicine for adults with mild to moderate COVID-19.
It is for adults over 18 with COVID-19 and at least one risk factor for severe disease.
Taking Paxlovid early can lower the risk of severe illness or hospitalisation.
One dose is two pink tablets and one white tablet, taken twice daily for five days.
It is important to complete the full course of treatment as prescribed.
Paxlovid can affect other medicines, so tell your doctor about all medicines you take.
Common side-effects include headache, diarrhoea, vomiting, or an altered sense of taste.
About Paxlovid® tablets
Tipo di medicinale | Antiviral agent |
Utilizzato per | Treatment of mild to moderate COVID-19 disease in adults over 18 years of age |
Chiamato anche | Ritonavir and nirmatrelvir |
Disponibile come | Compresse |
Paxlovid® is a combination product containing two different tablets of antiviral medicines: ritonavir and nirmatrelvir. This medicine has been authorised in the UK under a conditional approval scheme and will be monitored closely.
Nirmatrelvir is active against the SARS-CoV-2 virus and prevents the virus from replicating. Ritonavir, although an antiviral medicine, is not active against SARS-CoV-2. Ritonavir is included in the treatment pack because it slows the breakdown of nirmatrelvir in the body and so leads to higher blood levels for longer. Taking ritonavir tablets at the same time is essential for the treatment to work.
Paxlovid® is used for adults aged over 18 who have tested positive for COVID-19 and have at least one risk factor for severe disease. Taking Paxlovid® as soon as possible once COVID-19 symptoms have started can lower your risk of being severely ill or needing hospital admission.
Clinical trials have shown that Paxlovid® may reduce the risk of needing hospital admission or dying from COVID-19 disease by up to 89%.
People at high risk of severe COVID-19 disease include those with medical conditions such as long-term cardiache, lung, liver, renali or nerve problems, people with diabete and people with weakened immune systems.
Before taking Paxlovid® tablets
Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking Paxlovid® tablets it is important that your doctor knows:
Se sei incinta, stai cercando di avere un bambino o stai allattando.
Se hai problemi con il funzionamento del tuo fegato o dei tuoi reni.
If you are being treated for HIV infection.
If you are taking any other medicines. This is important as Paxlovid® affects the blood levels of many commonly used medicines. This includes medicines which are available to buy without a prescription, as well as some herbal and complementary medicines.
Se hai mai avuto una reazione allergica a un medicinale.
How to take Paxlovid® tablets
Before you start this treatment, read the manufacturer's printed information leaflet from inside your pack. The manufacturer’s leaflet will give you more information about Paxlovid® tablets and a full list of side-effects which you may experience from taking them.
Take Paxlovid® tablets exactly as your doctor tells you to. There are two differently coloured tablets. The pink tablets each contain 150 mg of nirmatrelvir. The white tablets each contain 100 mg of ritonavir.
One dose of Paxlovid® consists of two pink tablets and one white tablet taken together at the same time.
The tablets are presented in five 'daily dose cards' with enough tablets for each day of treatment.
Take one dose twice each day for five days. Space your doses evenly apart, every 12 hours.
Make sure you complete the full course of treatment even if you are feeling better.
Swallow the tablets whole with a drink of water. Do not break, chew or crush the tablets.
It is not important whether you take your doses before or after food.
If you forget to take a dose, take it as soon as you remember unless it has been more than eight hours since it was due. If it has been more than eight hours, leave out the forgotten dose and take your next dose when it is due. Do not take two doses together to make up for a missed one.
Ottenere il massimo dal tuo trattamento
Treatment with Paxlovid® should be started as soon as possible after diagnosis of COVID-19 disease and within the first five days of symptoms.
Help your body fight the infection by drinking plenty of water, eating sensibly and getting lots of rest.
The best way to protect yourself against COVID-19 is through vaccination. Ensure your vaccinations are up to date in line with national guidance.
Paxlovid® can affect the metabolism of many commonly used medicines and could lead to you experiencing additional side-effects. Ask a pharmacist to check each of your prescribed medicines and advise you on any specific action to take. If you buy any medicines, check with a pharmacist that they are suitable for you to take with Paxlovid® tablets.
People taking certain medicines may need extra checks by their doctor to make sure their treatment hasn't been affected by taking Paxlovid®. Try to attend any blood tests or follow-up appointments that your doctor arranges.
There are limited data on the use of Paxlovid® during pregnancy. For this reason pregnant women should only be treated with Paxlovid® if there is a clear benefit. If there is a chance you could get pregnant, you should use effective contraception during treatment with Paxlovid®. Discuss with your doctor which types may be suitable for you.
Paxlovid® can reduce the effectiveness of combined hormonal contraceptives. Women using this type of contraception should use an additional barrier method of contraception during treatment with Paxlovid® and for one complete menstrual cycle afterwards.
There are limited data on the use of Paxlovid® when breastfeeding. Mothers who are breastfeeding should stop doing so during treatment with Paxlovid® and for 48 hours after your last dose.
Can Paxlovid® tablets cause problems?
Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the most common ones associated with Paxlovid® tablets. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.
Common Paxlovid® side-effects (affecting fewer than 1 in 10 people) | Cosa posso fare se sperimento questo? |
Mal di testa | Drink plenty of water and ask a pharmacist to recommend a suitable painkiller. |
Diarrhoea, being sick (vomiting) | Drink plenty of water to replace the fluids lost. Stick to simple meals - avoid rich or spicy foods |
An altered sense of taste or a metallic taste | This should pass after stopping treatment with Paxlovid®. Take frequent sips of water, try sucking sugar-free sweets |
Se si verificano altri sintomi che ritieni possano essere dovuti a questo medicinale, parla con il tuo medico o farmacista.
How to store Paxlovid® tablets
Tenere tutti i medicinali fuori dalla portata e dalla vista dei bambini.
Conservare in un luogo fresco e asciutto, lontano da fonti di calore e luce diretta.
Informazioni importanti su tutti i medicinali
Informazioni importanti su tutti i medicinali
Non assumere mai più della dose prescritta. Se sospetti che tu o qualcun altro possa aver assunto un sovradosaggio di questo medicinale, recati al pronto soccorso del tuo ospedale locale. Porta con te il contenitore, anche se è vuoto.
Questo medicinale è per te. Non darlo mai ad altre persone, anche se la loro condizione sembra essere la stessa della tua.
If you are having an operation or dental treatment, tell the person carrying out the treatment that you are taking Paxlovid® tablets.
Non conservare medicinali scaduti o indesiderati. Portali alla tua farmacia locale che li smaltirà per te.
Se hai domande su questo medicinale, chiedi al tuo farmacista.
Segnala effetti collaterali di un medicinale o vaccino
Se si verificano effetti collaterali, è possibile segnalarli online tramite il Sito web Yellow Card.

Non sei sicuro di mescolare i medicinali?
Controlla le possibili interazioni tra farmaci, integratori e alimenti prima di assumerli insieme.
Domande frequenti
What is the purpose of the two different medicines in Paxlovid® tablets?
Paxlovid® contains nirmatrelvir, which directly prevents the SARS-CoV-2 virus from multiplying in your body. It also contains ritonavir, which isn't active against the virus itself but helps increase the levels of nirmatrelvir in your blood, making it more effective for a longer period.
How quickly after testing positive for COVID-19 should I start taking Paxlovid®?
To get the most benefit from Paxlovid®, treatment should be started as soon as possible after you are diagnosed with COVID-19. It is important to begin treatment within the first five days of your symptoms starting.
If I am pregnant or breastfeeding, can I take Paxlovid®?
There is limited information available about using Paxlovid® during pregnancy. It should only be used if the potential benefits are clearly greater than any risks. If there's a chance you could become pregnant, you should use effective contraception throughout the treatment. For breastfeeding mothers, it is advised to stop breastfeeding during treatment with Paxlovid® and for 48 hours after your last dose, as there's limited data on its use while breastfeeding.
What should I do if I notice an unusual or metallic taste while taking Paxlovid®?
An altered sense of taste or a metallic taste is a common side-effect of Paxlovid®. This usually goes away after you finish the treatment. To help manage it, you can try taking frequent sips of water or sucking on sugar-free sweets.
Does Paxlovid® interact with other medications I might be taking?
Yes, Paxlovid® can affect how many other commonly used medicines work, potentially leading to additional side-effects. It's crucial to inform your doctor about all medicines you are taking, including over-the-counter and herbal remedies. You should also ask a pharmacist to check for any interactions with your prescribed medications and advise on suitable actions.
Ulteriori letture e riferimenti
- Manufacturer's PIL, Paxlovid® 150 mg/100 mg film-coated tablets; Pfizer Ltd, The electronic Medicines Compendium. Dated August 2024.
- Medicinali Completi BNF 89ª Edizione; Associazione Medica Britannica e Società Farmaceutica Reale di Gran Bretagna, Londra.
Informazioni sull'autoreVisualizza il profilo completo

Michael Stewart, MRPharmS
Responsabile Revisione Foglietti Illustrativi – Contrattista, Farmacista
BPharm (Hons), MRPharmS
Michael è un farmacista comunitario che esercita nelle Midlands e nel South Yorkshire con oltre 20 anni di esperienza nel consigliare su farmaci e condizioni mediche. Ha una solida esperienza nella formazione sanitaria, avendo prodotto e tenuto corsi di formazione per team di farmacia e personale di strutture di assistenza residenziale, inclusi infermieri. Ha anche contribuito a consigli consultivi farmaceutici per la gestione di condizioni a bassa gravità nella comunità.
Informazioni sul recensore

Sid Dajani
Sultan Dajani si è laureato alla London School of Pharmacy nel 1994 ed è diventato il più giovane membro eletto del consiglio della Royal Pharmaceutical Society dalla sua fondazione nel 1842.
Storia dell'articolo
Le informazioni su questa pagina sono scritte e revisionate da clinici qualificati.
Articolo disponibile anche in Inglese, Tedesco, Spagnolo, Francese, Italiano, Portoghese, Hindi, Ebraico, Arabo, and Svedese.
Prossima revisione prevista: 19 Gen 2028
19 Gen 2025 | Ultima versione

Chiedi, condividi, connettiti.
Esplora le discussioni, fai domande e condividi esperienze su centinaia di argomenti di salute.
Iscriviti alla newsletter di Patient
La tua dose settimanale di consigli sulla salute chiari e affidabili - scritti per aiutarti a sentirti informato, sicuro e in controllo.
Abbonandoti accetti i nostri Informativa sulla Privacy. Puoi annullare l'iscrizione in qualsiasi momento. Non vendiamo mai i tuoi dati.
Più nella medicina per il trattamento delle infezioni
- Abacavir per HIV
- Ampicillina per infezioni
- Azitromicina per infezione
- Cefadroxil per infezione
- Claritromicina per infezione
- Co-fluampicil per infezione
- Cicloserina per la tubercolosi
- Entecavir per l'epatite B
- Griseofulvina per infezioni fungine
- Itraconazolo per infezioni fungine
- Crema al ketoconazolo
- Compresse di levofloxacina per infezione
- Mebendazolo
- Meflochina per la prevenzione della malaria
- Compresse di Norfloxacina per infezione
- Unguento cutaneo di polimixina e bacitracina
- Pirazinamide per la tubercolosi
- Compresse di Rilpivirina per l'HIV