MemoHoney Side Effects: Seven Questions to Ask Your Pharmacist Before the First Capsule
Quick answer
Mild stomach upset is possible with the arginine in MemoHoney. Niacin flushing and beta alanine tingling look unlikely at 7.5 mg and 40 mg. The bigger issue is medicine clashes: arginine and citrulline can lower blood pressure and add to nitrates, sildenafil-type drugs and some diabetes medicines. Ask your pharmacist first.
What side effects are possible with MemoHoney?
Mostly mild ones, and several are unlikely at the amounts on the label. Remember the limit of what we can say: nobody has tested this capsule in people, so the list below comes from research on its ingredients.
| Effect | How likely at one capsule | Why |
|---|---|---|
| Stomach upset: nausea, belly pain, bloating, diarrhea | Possible | Mayo Clinic lists these among arginine's side effects (Mayo Clinic, L-arginine) |
| Headache or an allergic reaction | Possible, uncommon | Mayo Clinic also lists headache and allergy for arginine. WebMD lists serious allergic reactions as possible with beta alanine (WebMD, Beta-Alanine) |
| Warm, red, itchy skin from niacin | Unlikely | A flush normally needs 30 to 50 mg or more of nicotinic acid (NIH ODS, Niacin (health professional)). The capsule has 7.5 mg NE |
| Pins-and-needles tingling from beta alanine | Unlikely | Reported from about 800 mg (NIH ODS, Dietary Supplements for Exercise and Athletic Performance). The capsule has 40 mg |
| Lightheadedness or low blood pressure | Possible with certain medicines | Arginine can lower blood pressure, and the effect may add to medicines that do the same |
If you take a multivitamin or a B-complex as well, add up the niacin on every label. The upper limit from supplements for adults is 35 mg a day, and it counts all products together (NIH ODS, Niacin (consumer)).
If your pharmacist has checked the label against your medicines, the brand's order page shows the packs and the 60-day refund terms.
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Key facts
- No study of the finished capsule exists. Every caution comes from research on single ingredients, usually at higher doses.
- Possible effects: nausea, belly pain, bloating or diarrhea. Mayo Clinic also lists headache and allergic reactions among arginine's effects.
- Flushing usually needs 30 to 50 mg or more of nicotinic acid. One capsule has 7.5 mg NE, and the form is not named.
- Beta alanine tingling is reported from about 800 mg. One capsule has 40 mg.
- Arginine and citrulline can lower blood pressure, so they may stack with blood pressure tablets, nitrates, sildenafil-type drugs and diabetes medicines.
- Arginine is not recommended after a recent heart attack.
- The label's caution box sends pregnant or nursing mothers, under-18s and anyone with a medical condition to a physician before use.
Which medicines raise the most questions?
| Medicine group | The worry named in the sources | Who decides |
|---|---|---|
| Blood pressure pills | Arginine may lower pressure further. One drug reference grades the mix as Major | Your prescriber, before day one |
| Nitrates for chest pain (nitroglycerin, isosorbide) | Blood pressure may drop too low, with more dizziness | Your cardiologist |
| Sildenafil, tadalafil, vardenafil | WebMD warns of a dangerous drop in blood pressure with citrulline (WebMD, L-citrulline) | The prescriber of that drug |
| Insulin or diabetes tablets | Arginine may lower blood sugar further, adding to the drug's effect | Your doctor |
| Blood thinners | Mayo Clinic lists a bleeding risk | Your doctor |
| Potassium-sparing water pills | Potassium may climb too high | Your doctor |
| A thyroid pill (levothyroxine) | Calcium carbonate can lower its absorption within four hours (NIH ODS, Calcium (consumer)) | Your pharmacist, about timing |
No source sets an amount of arginine below which these warnings stop. A small dose is not a free pass.
What are the seven questions to ask your pharmacist?
Take the bottle, or a sharp photo of the Supplement Facts panel, plus a list of everything you swallow. Pharmacists can only spot a clash they can see.
- Does anything on this label clash with my prescriptions, over-the-counter pills or other supplements?
- I take a blood pressure pill or a nitrate. Could this capsule add to it, and what should I watch for?
- I take a sildenafil-type medicine. Is the citrulline and arginine a problem?
- I have diabetes. Should I check my blood sugar more often at first?
- I take a thyroid pill. How far apart should I keep it from this capsule?
- I also take a multivitamin or B-complex. Does the niacin add up to more than the 35 mg limit?
- I have surgery booked. When should I stop?
On the last point, one drug reference advises stopping arginine at least two weeks before a planned operation (RxList, L-Arginine), and NCCIH also says to tell your care team about every supplement well ahead of an operation (NCCIH, Using Dietary Supplements Wisely).
Who should skip it or get a cardiologist's word first?
- Anyone who has had a heart attack. The VINTAGE MI trial followed 153 people after a heart attack. They took about 9 g of arginine a day or a placebo. Six people on arginine died and none on placebo, and the researchers advised against offering arginine in that situation (JAMA 2006, Schulman et al., VINTAGE MI). A capsule holds far less, but nobody has shown a safe lower limit.
- Pregnant or nursing mothers. The label tells them to consult a physician.
- Anyone under 18. The label sends them to a physician too.
- People with frequent cold sores. One drug reference says arginine might make herpes worse. Ask a doctor first.
- Anyone with a known medical condition. The label asks for a physician's advice.
Is there a memory supplement with no side effects?
No product can promise that. Searches such as memory supplements with no side effects and safest most effective memory supplement look for a clean answer. There is none. NCCIH notes that natural does not always mean safe, and that a product may hold ingredients that are not on its label (NCCIH, Using Dietary Supplements Wisely).
No FDA approval is needed before a supplement goes on sale, and the maker answers for safety and labeling (FDA, FDA 101: Dietary Supplements). The AARP-convened expert council adds that quality varies between products (Global Council on Brain Health (AARP), The Real Deal on Brain Health Supplements). The practical response is modest: choose a product whose label you can read in full, keep the dose to what the label says and let a pharmacist check it against your medicines.
Could your forgetfulness be a side effect of a medicine?
It can happen. Per the National Institute on Aging, treatable causes of memory loss include thyroid, kidney or liver problems, low vitamin B12 and the side effects of some medicines (NIA, Forgetfulness: Knowing When to Ask for Help). So ask for a full medicine review before you add anything new.
NCCIH adds a warning not to let a supplement become a reason to delay seeing a provider (NCCIH, 7 Things To Know About Supplements and Alzheimer's).
When should you stop taking it?
- Right away
Call 911
Face, lip or throat swelling, spreading hives, or difficulty breathing.
- Same day
Stop it and phone your doctor
You faint, feel chest pain, or get dizzy whenever you stand up.
- Within the week
Stop and ask
Belly pain or loose stools that persist, low blood sugar readings, or a flare of cold sores.
- Two weeks ahead
Planned surgery
Stop at least two weeks before, and tell the surgical team about the arginine.
Hold on to the bottle so the person you call can read the label. Stopping does not shorten your 60-day refund window.
Frequently asked questions
What are the side effects of MemoHoney?
Mild stomach upset is possible. Flushing and tingling are unlikely at the amounts printed. The main concern is interaction with blood pressure, heart and diabetes medicines.
Is MemoHoney safe?
For a healthy adult on no interacting medicines, no source we read flags a problem at these doses. But no study tested the capsule, so check with a pharmacist first.
Can brain supplements cause headaches?
Headache is listed among arginine's possible side effects by Mayo Clinic. Any new headache after starting a product is worth mentioning to your pharmacist.
Can I take MemoHoney with blood pressure pills?
Check with your prescriber first. Arginine lowers blood pressure by itself, and alongside a medicine the drop could be too big.
Are memory supplements safe to take?
It depends on the product and on your medicines. No supplement is free of risk, and natural does not always mean safe.
Is there a memory supplement with no side effects?
No product can promise that. Read the label, keep to the dose and have a pharmacist check it against your medicines.
Our view
For many healthy adults the amounts on this label are small, and the likely side effects are mild. That is the calm half of the story.
The other half is for people past 50, when blood pressure, heart and diabetes medicines become common. Arginine and citrulline sit exactly where those medicines work. That is why the seven questions above are worth ten minutes at the pharmacy counter.
If your pharmacist and doctor are happy and you still want to try it, keep to one capsule a day and watch how you feel. If anything on the stop list appears, stop and call.
Last updated October 15, 2026. Published October 15, 2026. Written by the MemoHoney Editorial Desk. Medically reviewed by Dr. Kellyann Niotis, MD, Physician on October 15, 2026.
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Page check
Written by
Reads the printed MemoHoney label and weighs each health statement against NIH, Mayo Clinic and Alzheimer's Association guidance.
Medical check
Dr. Kellyann Niotis, MD, Physician
Medical reviewer. Reviewed for accuracy against the label and the cited sources on October 15, 2026.
- Published and updated October 15, 2026
- Product details: the printed label, the brand's pages and the seller pack. Health details: the sources linked in the text
- Found an error? Write to [email protected]. How we work: editorial standards
