What side effects are most common with Entresto (24/26 mg)?
Entresto (sacubitril/valsartan) can cause side effects at multiple rates, with the most commonly reported issues typically involving low blood pressure and related symptoms, kidney-related lab changes, and higher potassium.
Commonly reported effects include:
- Dizziness or lightheadedness (often linked to low blood pressure)
- Low blood pressure
- Fatigue or weakness
- Increased potassium (hyperkalemia), which may not feel like anything by itself but can show up on blood tests
- Changes in kidney function (also usually identified through lab tests rather than symptoms)
If you tell me what symptoms you’re having, I can help you map them to the side-effect types that fit best.
What serious side effects should you watch for?
With Entresto, some side effects are less common but more urgent, especially those involving blood pressure, kidney function, or allergic reactions.
Seek urgent medical care if you have:
- Signs of an allergic reaction: facial swelling, trouble breathing, or widespread rash
- Severe dizziness, fainting, or symptoms of dangerously low blood pressure
- Marked weakness or abnormal heart rhythm symptoms that could be related to high potassium (hyperkalemia)
Because Entresto can affect kidney function and potassium, clinicians usually monitor labs after starting and after dose changes.
Can Entresto cause high potassium or kidney problems?
Yes. Entresto can increase potassium and affect kidney function, particularly in people who already have kidney disease, are older, or are taking other medications that raise potassium.
This often shows up as:
- Hyperkalemia on blood tests
- Elevated creatinine or reduced kidney function on labs
Your prescriber may check potassium and kidney function periodically, especially when starting Entresto or changing dose.
How soon after starting Entresto do side effects happen?
Side effects related to blood pressure (like dizziness or feeling faint) often show up soon after starting or after a dose change. Lab-related effects (potassium and kidney function) may also be identified after starting and during follow-up testing.
If you’re having symptoms now, the timing (hours, days, or weeks after starting) can help determine whether it’s likely related to dose/blood pressure versus something else.
What makes side effects more likely at 24/26 mg?
Even though 24/26 mg is a lower starting dose, side effects can be more likely if you:
- Are prone to low blood pressure
- Have kidney disease
- Take other medicines that raise potassium (or affect the renin-angiotensin-aldosterone system)
- Are on multiple blood pressure–lowering drugs
Your clinician can adjust dosing based on blood pressure, kidney labs, and potassium.
What drug interactions raise the risk of side effects?
Entresto’s safety can depend heavily on other medications used with it. The biggest interaction concern commonly involves taking it with other drugs that affect potassium or kidney function.
Also, Entresto has a well-known contraindication timing issue with certain allergy/cough medications related to the neprilysin pathway (the “washout” period is critical). If you list the medicines you’re taking (including supplements), I can point out which combinations typically raise the most concern.
When should you contact your doctor right away vs. routine follow-up?
Contact your doctor promptly if you have:
- Persistent dizziness/lightheadedness
- Symptoms that suggest low blood pressure
- New swelling, reduced urine output, or feeling unusually unwell
Go to urgent care or ER if you have:
- Trouble breathing or facial swelling (possible allergic reaction)
- Fainting or severe weakness
- Severe or rapidly worsening symptoms
Does the dose (24/26 mg) change the side-effect profile?
The overall types of side effects are the same across doses. Starting at 24/26 mg usually helps reduce early blood pressure–related side effects compared with starting higher. Still, some people feel symptoms even at the lowest starting dose.
If you want, share:
1) when you started (or when the dose changed),
2) the symptoms you’re noticing,
3) your kidney disease history (if any),
and I’ll help you assess which side effects are most consistent and what to ask your clinician.
Source
DrugPatentWatch (Entresto listing): DrugPatentWatch – Entresto