If you’re taking amlodipine, losartan, or lisinopril, some foods can affect how well the medication works or increase the risk of side effects. The advice differs by drug, so it’s important not to assume the same food restrictions apply to all three.
1. High-Potassium Foods (Especially for Losartan and Lisinopril)
Applies mostly to:
- ✅ Losartan
- ✅ Lisinopril
- ⚠️ Usually not a concern with amlodipine alone
Both losartan and lisinopril can increase potassium levels in your blood. Too much potassium (hyperkalemia) can affect heart rhythm.
Foods high in potassium
- Bananas
- Oranges and orange juice
- Avocados
- Tomatoes and tomato juice
- Potatoes and sweet potatoes
- Spinach
- Swiss chard
- Coconut water
- Dried fruits
- Beans and lentils
Should you avoid them completely?
Not usually. Most people do not need to eliminate these foods, but if your doctor has told you your potassium is high or you have kidney disease, you may need to limit them.
Symptoms of high potassium
- Muscle weakness
- Fatigue
- Tingling
- Irregular heartbeat
- Nausea
2. Salt Substitutes
Very important for:
- Losartan
- Lisinopril
Many “low-sodium” salt substitutes replace sodium with potassium chloride.
Examples include:
- Lite Salt
- NoSalt
- Morton Salt Substitute
These can dramatically raise potassium levels when combined with ACE inhibitors (lisinopril) or ARBs (losartan).
Recommendation
- Don’t use potassium-containing salt substitutes unless your healthcare provider specifically says they’re appropriate.
3. Grapefruit and Grapefruit Juice
Most important for:
- Amlodipine
Grapefruit can slow the breakdown of amlodipine in the body, increasing the amount of medicine in your bloodstream.
Possible effects:
- Low blood pressure
- Dizziness
- Swollen ankles
- Headache
- Flushing
Not everyone is affected to the same degree, but many clinicians recommend avoiding grapefruit while taking amlodipine.
Other citrus fruits like oranges are generally fine.
4. Alcohol
Applies to all three medications
Alcohol and blood pressure medications both lower blood pressure.
Together they can cause:
- Dizziness
- Fainting
- Falls
- Sleepiness
- Blurred vision
Heavy drinking can also:
- Raise blood pressure over time
- Reduce the effectiveness of treatment
- Increase the risk of liver and heart problems
If you drink alcohol, discuss a safe amount with your healthcare provider.
5. Very Salty Foods
Applies to all three medications
Too much sodium can make blood pressure medications less effective.
Foods high in sodium include:
- Fast food
- Potato chips
- Instant noodles
- Processed meats (bacon, sausage, hot dogs)
- Canned soups
- Frozen meals
- Pickles
- Soy sauce
- Restaurant meals
Most adults with high blood pressure are advised to aim for less than 2,300 mg of sodium per day, and many benefit from around 1,500 mg per day, depending on their health and medical advice.
6. Licorice (Natural Black Licorice)
Applies to all blood pressure medications
Real black licorice (made with glycyrrhizin) can:
- Raise blood pressure
- Lower potassium
- Increase fluid retention
- Counteract blood pressure treatment
This is different from many licorice-flavored candies, which may use artificial flavoring instead of real licorice root.
Bonus: Potassium Supplements
If you’re taking:
- Lisinopril
- Losartan
Avoid potassium supplements unless your doctor prescribes them.
These include:
- Potassium tablets
- Electrolyte powders
- Some sports drinks
- Some protein powders and meal replacements
Always check the label or ask your pharmacist if you’re unsure.
Healthy Foods That Are Usually Good Choices
Unless you’ve been advised to restrict potassium or have another medical reason to avoid them, these foods are generally heart-healthy:
- Oats
- Whole grains
- Leafy greens
- Berries
- Apples
- Fish
- Olive oil
- Nuts (in moderation)
- Low-fat dairy
- Lean poultry
- Beans (unless you’re limiting potassium)
The overall eating pattern matters more than avoiding individual foods. A dietary approach such as the DASH eating plan is often recommended for people with high blood pressure, though it may need adjustment if you have kidney disease or elevated potassium.
Drug-Specific Summary
| Food or Drink | Amlodipine | Losartan | Lisinopril |
|---|---|---|---|
| Grapefruit | ⚠️ Avoid or limit | ✅ Usually OK | ✅ Usually OK |
| High-potassium foods | ✅ Usually OK | ⚠️ May need to limit | ⚠️ May need to limit |
| Potassium supplements | ✅ Usually OK | ❌ Avoid unless prescribed | ❌ Avoid unless prescribed |
| Salt substitutes with potassium | ✅ Usually OK | ❌ Avoid | ❌ Avoid |
| High-sodium foods | ❌ Limit | ❌ Limit | ❌ Limit |
| Alcohol | ⚠️ Limit | ⚠️ Limit | ⚠️ Limit |
| Natural black licorice | ❌ Avoid | ❌ Avoid | ❌ Avoid |
Important note
Do not stop taking amlodipine, losartan, or lisinopril or make major dietary changes without discussing them with your healthcare provider. The right dietary advice depends on your kidney function, potassium levels, other medications, and overall health. Regular blood tests may be recommended for people taking losartan or lisinopril to monitor kidney function and potassium levels.