Tenofovir alafenamide

Generic name: Tenofovir Alafenamide
Drug class: Nucleoside reverse transcriptase inhibitors (NRTIs)

Usage of Tenofovir alafenamide

Tenofovir alafenamide is used to treat chronic hepatitis B virus (HBV) infection in patients with compensated liver disease.

This medicine is available only with your doctor's prescription.

Tenofovir alafenamide side effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

Incidence not known

Agitation

bloody urine

coma

confusion

dark urine

decreased appetite

decreased frequency or amount of urine

diarrhea

dizziness

fast, shallow breathing

general feeling of discomfort

headache

hostility

increased blood pressure

increased thirst

irritability

lethargy

light-colored stools

loss of appetite

lower back or side pain

muscle pain, cramping, or twitching

nausea and vomiting

right upper abdominal or stomach pain and fullness

seizures

sleepiness

stomach discomfort

stupor

swelling of the face, fingers, or lower legs

trouble breathing

unusual tiredness or weakness

weight gain

yellow eyes and skin

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Acid or sour stomach

belching

cough

difficulty in moving

heartburn

indigestion

joint pain

muscle stiffness

Less common

Back pain

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

Before taking Tenofovir alafenamide

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies have not been performed on the relationship of age to the effects of tenofovir alafenamide in children younger than 12 years of age. Safety and efficacy have not been established.

Geriatric

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of tenofovir alafenamide in the elderly.

Breast Feeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Interactions with Medicines

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

Carbamazepine

Fosphenytoin

Phenobarbital

Phenytoin

Primidone

Rifampin

St John's Wort

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

Aceclofenac

Acemetacin

Acyclovir

Adagrasib

Amikacin

Amikacin Liposome

Amiodarone

Amtolmetin Guacil

Apalutamide

Aspirin

Bufexamac

Choline Salicylate

Cidofovir

Clarithromycin

Clonazepam

Clonixin

Cobicistat

Conivaptan

Cyclosporine

Darolutamide

Dexibuprofen

Dexketoprofen

Diclofenac

Diflunisal

Dipyrone

Dronedarone

Droxicam

Enasidenib

Encorafenib

Erythromycin

Eslicarbazepine Acetate

Etodolac

Etofenamate

Etoricoxib

Felbinac

Fenoprofen

Fepradinol

Feprazone

Flibanserin

Floctafenine

Flufenamic Acid

Flurbiprofen

Ganciclovir

Gentamicin

Ibuprofen

Indomethacin

Itraconazole

Kanamycin

Ketoconazole

Ketoprofen

Ketorolac

Lapatinib

Leflunomide

Leniolisib

Lornoxicam

Loxoprofen

Lumiracoxib

Meclofenamate

Mefenamic Acid

Meloxicam

Midostaurin

Momelotinib

Morniflumate

Nabumetone

Naproxen

Neomycin

Nepafenac

Netilmicin

Niflumic Acid

Nimesulide

Nimesulide Beta Cyclodextrin

Oxaprozin

Oxcarbazepine

Oxyphenbutazone

Parecoxib

Paromomycin

Phenylbutazone

Piketoprofen

Piroxicam

Plazomicin

Pranoprofen

Proglumetacin

Propyphenazone

Proquazone

Quinidine

Ranolazine

Rifabutin

Rifapentine

Ritonavir

Rofecoxib

Salicylic Acid

Salsalate

Sodium Salicylate

Spectinomycin

Streptomycin

Sulindac

Tafamidis

Telaprevir

Tenoxicam

Teriflunomide

Tiaprofenic Acid

Tipranavir

Tobramycin

Tolfenamic Acid

Tolmetin

Valacyclovir

Valdecoxib

Valganciclovir

Vemurafenib

Verapamil

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

Eltrombopag

Interactions with Food/Tobacco/Alcohol

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

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How to use Tenofovir alafenamide

Take this medicine exactly as directed by your doctor. Do not take it more often, and do not take it for a longer time than your doctor ordered. Certain tests may be needed before you start this medicine. Talk to your doctor if you have questions.

This medicine comes with a patient information leaflet. Read and follow these instructions carefully. Read it again each time you refill your prescription in case there is new information. Ask your doctor if you have any questions.

Keep taking tenofovir for the full time of treatment, even if you or your child begins to feel better. Do not change the dose or stop using this medicine without checking first with your doctor. When your supply of the medicine is running low, contact your doctor or pharmacist ahead of time. Do not allow yourself to run out of the medicine.

It is best to take this medicine with food.

Swallow the tablet whole. Do not crush, break, or chew it .

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take Depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

For oral dosage form (tablets):

For treatment of chronic hepatitis B infection:

Adults and children 12 years of age and older—25 milligrams (mg) once a day.

Children younger than 12 years of age—Use and dose must be determined by your doctor.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep the bottle tightly closed. Use the medicine dispensed only in its original container.

Warnings

It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly. Blood and urine tests may be needed to check for unwanted effects.

If you also have HIV, your doctor may do tests before starting this medicine. .

Do not stop using this medicine without checking first with your doctor. Your infection may get worse if you suddenly stop taking this medicine.

Two rare but serious reactions to this medicine are lactic acidosis (too much acid in the blood) and liver toxicity. These reactions are more common if you are female, obese, or have been taking anti-HIV medicines for a long time. Call your doctor right away if you have stomach pain, nausea, vomiting, decreased appetite, muscle cramping or pain, unusual tiredness or weakness, trouble breathing, or yellow skin or eyes.

Check with your doctor right away if you have bloody urine, a decrease in frequency or amount of urine, an increase in blood pressure, increased thirst, loss of appetite, lower back or side pain, nausea, swelling of the face, fingers, or lower legs, trouble breathing, unusual tiredness or weakness, vomiting, or weight gain. These could be symptoms of a serious kidney problem.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal (eg, St. John's wort) or vitamin supplements.

Disclaimer

Every effort has been made to ensure that the information provided by Drugslib.com is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Drugslib.com information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Drugslib.com does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Drugslib.com's drug information does not endorse drugs, diagnose patients or recommend therapy. Drugslib.com's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners.

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