Jyna Tenofovir Disoproxil Fumarate Tablets 300 mg Tablet (Tenofovir Alafenamide Fumarate) — Uses, Dosage & NAFDAC

Who is this for?

What is this drug?

Tenofovir Alafenamide (TAF) is an antiviral medicine that works by blocking a virus from making copies of itself in your body. It is a newer, improved version of the older tenofovir that is gentler on your kidneys and bones.

What is it used for?

Hepatitis B (liver infection caused by hepatitis B virus)HIV infection (usually combined with other HIV medicines)

Browse by condition

Hepatitis B & C HIV & AIDS Liver Conditions STIs & Sexual Health

Prescription Required

You need a doctor's prescription to buy this drug.

Quick Interaction Check

Is Tenofovir safe to take with another drug?

Check with multiple drugs →

Explore this drug

How to take this drug

For hepatitis B: Take one 25 mg tablet once a day, with or without food. Swallow the tablet whole with water. Try to take it at the same time every day so you don't forget. In Nigeria, you may find it as Hepbest 25 mg or Vemlidy 25 mg. Do not stop taking this medicine on your own — stopping suddenly can cause your hepatitis B to flare up badly.

What if I Miss a Dose?

If you miss a dose and remember within 18 hours of your usual time, take it as soon as you remember. If it is almost time for your next dose, skip the missed one and continue your normal schedule. Never take two tablets at once to make up for a missed dose.

What to watch out for

Do not stop taking this medicine suddenly without your doctor's advice — stopping can cause a dangerous flare-up of hepatitis B that can seriously damage your liver. Buy only from licensed pharmacies — products like Hepbest and Vemlidy should come in proper sealed packaging; avoid buying from roadside vendors or unverified online sellers. Do not share this medicine with anyone, even if they have the same condition.

Common Side Effects

Headache
stomach pain or nausea
tiredness or feeling weak
cough
back pain

Serious Side Effects

Severe liver problems — signs include yellowing of eyes or skin (jaundice)
dark urine
or extreme tiredness. Lactic acidosis — a dangerous buildup of acid in the blood causing fast breathing
muscle pain
and unusual weakness. If you notice any of these
go to the hospital immediately.

Drug Interactions

Avoid taking with other medicines that contain tenofovir (like Viread or some HIV combination tablets) as this doubles the dose and can harm your kidneys. Rifampicin, commonly used for tuberculosis (TB) treatment in Nigeria, can reduce the effectiveness of this medicine — tell your doctor if you are on TB drugs. St. John's Wort (a herbal supplement) should be avoided as it can make this drug less effective.

Check your specific combination

Is it safe to take Tenofovir with your other drugs?

Check →

Pregnancy & Breastfeeding Warning

Consult your doctor before taking this medicine if you are pregnant, planning to become pregnant, or breastfeeding — the safety during pregnancy and breastfeeding is not fully established, so your doctor must weigh the benefits and risks.

Who Should NOT Take This

People who are allergic to tenofovir alafenamide or any ingredient in the tablet. People with severe liver failure should use this only under close medical supervision. Do not use this medicine for HIV treatment on its own — it must be combined with other HIV drugs if you are HIV positive.

How to Store

Store in a cool, dry place below 30°C — away from direct sunlight and humidity, which can be a problem in Nigerian weather. Keep in the original container with the lid tightly closed. Always keep out of reach of children.

For information only — not medical advice. Always talk to a doctor or pharmacist before changing your medication.

Jyna Tenofovir Disoproxil Fumarate Tablets 300 mg