1 What is this medicine
and what is it used for?
Triumeq is a once-daily, fixed-dose antiretroviral tablet
used to treat Human Immunodeficiency Virus type 1 (HIV-1) infection. It
combines three different antiretroviral agents targeting different steps in the
HIV replication cycle:
• Dolutegravir (DTG): an integrase
strand transfer inhibitor (INSTI) — blocks the HIV integrase enzyme, preventing
HIV DNA from being inserted into the host cell's chromosomes.
• Abacavir (ABC): a nucleoside reverse
transcriptase inhibitor (NRTI) — acts as a faulty building block, incorporated
into HIV DNA by reverse transcriptase and terminating viral DNA chain
elongation.
• Lamivudine (3TC): also an NRTI — same
mechanism as abacavir, providing complementary antiviral coverage.
The three-drug, single-tablet regimen (STR) combines high
efficacy, high genetic barrier to resistance (dolutegravir), and excellent
tolerability in a once-daily tablet.
2 How to take this
medicine
One tablet once daily — with or without food. Take at the
same time every day. Do not crush or chew. If you also take antacids, calcium
supplements, iron, or multivitamins, take Triumeq at least 2 hours before or 6
hours after these products.
|
BEFORE STARTING TRIUMEQ — CRITICAL HLA-B*5701
SCREENING: ALL PATIENTS MUST BE TESTED for the HLA-B*5701
allele before starting Triumeq. HLA-B*5701-positive patients must NOT receive
abacavir — severe, potentially fatal hypersensitivity reaction (HSR) can
occur. Prevalence of HLA-B*5701: approximately 5–8% in
white European populations; lower in Asian and African populations. Even in HLA-B*5701-negative patients, abacavir
HSR can rarely occur — watch for symptoms. |
3 Possible side effects
|
Frequency |
Side Effect |
What to Do |
|
Very Common (>10%) |
Headache |
Usually mild; improves
within first few weeks. |
|
Very Common (>10%) |
Insomnia / sleep
disturbance |
Take in the morning if
sleep is affected; discuss with doctor. |
|
Common (1–10%) |
Nausea |
Take with food;
usually improves within first 2–4 weeks. |
|
Common (1–10%) |
Fatigue / malaise |
Common in first few
weeks; usually resolves. |
|
Common (1–10%) |
Dizziness |
Avoid driving if
affected. |
|
Common (1–10%) |
Elevated liver enzymes |
LFTs monitored at
baseline and follow-up. |
|
Common (1–10%) |
Weight gain |
Monitor BMI; healthy
lifestyle important; discuss with doctor. |
|
Uncommon |
Neuropsychiatric
effects (depression, anxiety, insomnia, suicidal ideation) |
Report any mood
changes, depression or unusual thoughts to your doctor promptly. |
|
Rare but serious |
Abacavir
hypersensitivity reaction (HSR) |
See warning box below
— potentially life-threatening. |
|
Rare but serious |
Lactic acidosis with
hepatic steatosis |
NRTIs can rarely cause
life-threatening lactic acidosis — report unusual fatigue, nausea, breathing
difficulty. |
|
Seek help urgently |
Signs of abacavir HSR
(fever, rash, nausea, vomiting, diarrhoea, abdominal pain, malaise, within
first 6 weeks) |
STOP Triumeq and seek
urgent medical review — DO NOT restart. |
|
ABACAVIR HYPERSENSITIVITY REACTION —
CRITICAL: Signs typically appear within 6 weeks of
starting: FEVER and/or RASH, PLUS symptoms in two or more organ systems
(respiratory, GI, constitutional, neurological). STOP Triumeq immediately if HSR is suspected
and do not restart under any circumstances — re-challenge after a confirmed
reaction can be fatal within hours. Document the reaction clearly in the patient's
medical records and allergy list. This reaction occurs regardless of HLA-B*5701
status, though the risk is much higher in B*5701-positive patients. |
||
4 Who should not take
this medicine
Triumeq must not be given to: HLA-B*5701-positive patients;
patients with known hypersensitivity to dolutegravir, abacavir, or lamivudine;
and patients taking dofetilide or pilsicainide (serious cardiac arrhythmia
risk).
Use with caution in: moderate to severe hepatic impairment;
patients with or at risk of ischaemic heart disease (abacavir cardiovascular
risk association — observational data); pre-existing neuropsychiatric
conditions; renal impairment (lamivudine dose adjustment may be needed —
separate-component formulations preferable if CrCl <50 mL/min).
5 Drug interactions
• Dofetilide: CONTRAINDICATED —
dolutegravir significantly increases dofetilide levels (risk of fatal
arrhythmia).
• Antacids, calcium, iron, zinc,
magnesium-containing products: chelate dolutegravir — separate by 2 hours
before or 6 hours after.
• Rifampicin: reduces dolutegravir
levels by 54% — increase dolutegravir dose or switch regimen; Triumeq STR
cannot provide adequate dolutegravir dose for rifampicin co-treatment.
• Metformin: dolutegravir inhibits
renal OCT2 transporter and increases metformin exposure — reduce metformin
dose; monitor blood glucose.
• St John's Wort: reduces dolutegravir
levels — contraindicated.
• Sorbitol-containing liquid
formulations: may reduce lamivudine absorption — avoid.
6 Storage
Store at room temperature below 30°C. Keep in original
packaging. Keep out of reach of children. Do not use after expiry date.
7 Prescription
requirement
|
PRESCRIPTION ONLY
MEDICINE (POM) — HIV specialist prescription required. HLA-B*5701 testing
mandatory before initiation. Baseline and follow-up: HIV viral load, CD4
count, LFTs, renal function, glucose, lipids, HBsAg. |
8 Guidance for patients
& caregivers
Triumeq is one of the most commonly prescribed HIV treatments
because it is effective, well-tolerated, and simple — just one tablet once
daily. When taken consistently, it suppresses HIV to undetectable levels in the
blood, protects the immune system, prevents AIDS-defining illnesses, and
dramatically extends life expectancy.
Suppressing HIV to undetectable levels also means you cannot
sexually transmit the virus to partners — this is known as U=U (Undetectable =
Untransmittable), confirmed by large-scale clinical studies. However, you
should continue using barrier contraception to protect against other sexually
transmitted infections.
Never share your medication with anyone — HIV medicines are
prescribed based on individual factors including drug resistance testing and
HLA typing. Giving your medicine to someone else could cause them serious harm.
9 Pharmacist &
prescriber notes
Triumeq is the fixed-dose combination of the individual
medicines dolutegravir (Tivicay), abacavir (Ziagen), and lamivudine (Epivir).
Dolutegravir has a high genetic barrier to resistance making
regimen failure rare, especially in treatment-naive patients. HBsAg-positive
patients: abacavir/lamivudine does not adequately treat HBV — use
tenofovir-containing regimen instead.
For patients on metformin: assess baseline HbA1c/glucose
before starting, reduce metformin dose, and monitor closely — dolutegravir
consistently increases metformin AUC by ~79%.
For rifampicin co-administration: Triumeq STR is not suitable
— switch to dolutegravir 50 mg twice daily (double dose) plus separate
backbone, not available as STR. Neuropsychiatric adverse effects (insomnia,
anxiety, depression) are class effects of integrase inhibitors — monitor,
especially in patients with pre-existing mental health conditions.
10 Frequently asked
questions
Does Triumeq cure HIV?
No — Triumeq does not cure HIV. It
suppresses the virus to undetectable levels in the blood, allowing your immune
system to recover and preventing progression to AIDS. If you stop taking it,
the virus will rebound. Treatment is lifelong.
Can I stop taking Triumeq if I feel completely well?
No — HIV has no symptoms when
well-controlled. Stopping allows the virus to rebound rapidly, can damage your
immune system, and can lead to resistance to multiple antiretroviral drugs.
Continue Triumeq every day for life unless advised to change by your HIV
specialist.
I take omeprazole and calcium supplements — can I still
take Triumeq?
Omeprazole is fine with Triumeq.
However, calcium supplements, iron, zinc, magnesium, and antacids can
significantly reduce dolutegravir absorption. Take these products at least 2
hours before or 6 hours after Triumeq.
What does 'Undetectable = Untransmittable' mean?
U=U means that when HIV is suppressed
to undetectable levels by effective antiretroviral therapy, the virus cannot be
sexually transmitted to partners. This has been confirmed by large clinical
studies. You still need to maintain consistent adherence to Triumeq to stay
undetectable.
I am pregnant — can I continue Triumeq?
Triumeq (including dolutegravir) can
be continued during pregnancy — it has excellent efficacy in preventing
mother-to-child transmission. Earlier safety concerns about neural tube defects
with periconceptional dolutegravir exposure have been substantially reassured
by updated data showing no increased risk at standard clinical doses. Discuss
with your HIV specialist and obstetrician.