Memodyne Official Website › Side Effects
Side EffectsMemodyne side effects and interactions, ingredient by ingredient
No trial of this capsule exists, so its side-effect profile has never been measured.
What can be said is what each named ingredient is known to do at the amounts it has been studied at, and which prescriptions act on the same lever. The four nitric-oxide names are the reason anyone on a nitrate, a PDE5 inhibitor or a blood-pressure medicine should ask before starting.
What the seller states, what each name is known for, and the interaction that matters most on this particular label.
What the Memodyne seller says about safety
“Its formula contains only naturally derived ingredients, in vegetable capsules (hypromellose), without artificial stimulants and without harmful chemical additives. All ingredients are rigorously tested and no significant side effects have been reported by users.”The seller's own FAQ, read on 20 September 2026
Two useful facts are in that passage and one thing that is not a fact. The useful ones are the capsule shell — hypromellose, a plant cellulose, which answers the vegetarian question — and the absence of stimulants, which matches the artwork.
The part that is not a fact is no significant side effects have been reported by users. That describes what has come back through a seller's own support channel. It is not adverse-event monitoring, it is not a trial, and absence of reports is the weakest form of safety information there is.
The seller's own caution, in the same answer, is the more useful line: anyone pregnant, nursing, under eighteen, or on medication for blood pressure, blood thinning or vasodilation should show the label to a doctor before starting.
What each Memodyne ingredient is known for
| Ingredient | Known at studied amounts | Relevance here |
|---|---|---|
| Niacin | Flushing from nicotinic acid, dose-dependent. HPS2-THRIVE used 2 g a day of the extended-release form and recorded serious adverse effects at that pharmaceutical dose | The upper intake level is 35 mg a day and was set on flushing. A daily capsule would sit far below the THRIVE dose |
| Calcium carbonate | Constipation and bloating at supplemental amounts; interferes with the absorption of some antibiotics and thyroid medicine | A 2023 meta-analysis of twelve trials found no association with heart attack, stroke or mortality |
| L-Arginine | Gastrointestinal upset at gram doses; lowers blood pressure | Relevant to anyone already on an antihypertensive |
| L-Arginine AKG 2:1 | The same, plus the acute trials at 3 to 3.7 g found no performance effect and reported no notable harms | Same class, same caution |
| L-Citrulline HCl | Well tolerated in trials; the 8.8 g cerebrovascular trial reported no adverse events | The most studied of the four for tolerability |
| L-Citrulline Malate | Well tolerated; the six-week older-adult pilot reported no adverse events at 3 g a day | Same |
Every entry describes the ingredient at the amount its own studies used. No amount is published for this capsule, so none of these can be scaled to it.
The Memodyne interaction that matters most
L-arginine, L-arginine AKG, L-citrulline HCl and L-citrulline malate all raise the supply of arginine, and arginine is the substrate for nitric oxide. Nitric oxide relaxes blood-vessel walls.
Nitrates do the same thing by donating nitric oxide directly. PDE5 inhibitors do it by preventing the downstream signal from being broken down. Several antihypertensives arrive at the same place by other routes. Stacking them is how blood pressure drops further than intended.
This is one conversation, held once, with the person who writes the prescription. Take the bottle so the label can be read. The order desk on +1 (302) 200-3480 can confirm what is printed on a physical panel if the appointment needs it.
This is the reason rule-of-thumb advice is unhelpful here. The issue is not that a supplement might interact with something in general; it is that four of these six names act on one specific mechanism that three named classes of medicine also act on.
When to stop taking Memodyne
- Light-headedness on standing, which is what an unintended blood-pressure drop feels like.
- A persistent headache that started with the capsule and has not settled.
- Any rash, swelling or breathing difficulty. Stop and seek help; that is an allergic pattern rather than a side effect.
- Constipation that starts with the bottle, which would point at the calcium.
- Anything at all, if a prescriber has asked you to stop.
Follow the directions printed on the product label. For adults 18 and over. Talk to a doctor before use if you take medicine, and do not take more than the label says unless a clinician tells you to.
Questions worth asking a pharmacist about Memodyne
A pharmacist will answer these in three minutes, holds the full list of what you are already taking, and does not need an appointment. Take the bottle.
- Does anything on my repeat prescription act on nitric oxide or on blood pressure? That is the question this label turns on.
- I take a calcium supplement already — does adding an unspecified amount matter for me?
- I take a proton-pump inhibitor. Does a capsule containing calcium carbonate taken before food make sense in my case?
- Is there anything on my list whose absorption calcium interferes with, and if so how far apart should the two be taken?
- If I get flushing, is that a reason to stop or a reason to shrug?
None of those five needs anybody to have heard of this brand. They are questions about six named substances, which is exactly the level at which a pharmacist can be useful.
What the Memodyne container itself cautions
Supplement containers in this category carry a standard block of cautions and this one is no exception. The wording belongs to the manufacturer and is quoted rather than paraphrased.
- A dietary supplement, not a drug, and not FDA-approved.
- Not intended to diagnose, treat, cure or prevent any disease.
- For healthy adults of eighteen years and over only.
- Talk to a doctor before use if you take medicine.
- Do not take more than the label states unless a clinician says otherwise.
The line this shop would underline is the fourth one, and the reason is on this page: it is not a generic caution on this particular label, it is a specific one about a specific mechanism. Four of six names, one lever, three named classes of medicine.
Memodyne safety questions
Does Memodyne have side effects?
The seller states that no significant side effects have been reported by its users. That is a seller's statement about its own feedback rather than safety monitoring, and this page sets out what the named ingredients are known to do at the amounts they have been studied at.
Can Memodyne cause flushing?
Nicotinic acid causes flushing, and it is dose-dependent. Whether this capsule carries enough niacin to produce it, and in which form, is not published. Flushing is uncomfortable rather than harmful.
Is Memodyne safe with blood-pressure medicine?
That is a prescriber's question. Four of the six names raise nitric oxide, which relaxes blood vessels, and several common medicines act on the same end point. Take the bottle to the appointment.
Can Memodyne upset the stomach?
Amino acid salts taken on an empty stomach can, and this label directs the capsule into the fasting window. Calcium carbonate can also cause constipation at supplemental amounts.
Who publishes this Memodyne website?
- Minto C, Vecchio MG, Lamprecht M, Gregori D. Definition of a tolerable upper intake level of niacin: a systematic review and meta-analysis of the dose-dependent effects of nicotinamide and nicotinic acid supplementation. Nutr Rev. 2017;75(6):471-490. PMID 28541582. https://pubmed.ncbi.nlm.nih.gov/28541582/
- HPS2-THRIVE Collaborative Group; Landray MJ, Haynes R, Hopewell JC, et al. Effects of extended-release niacin with laropiprant in high-risk patients. N Engl J Med. 2014;371(3):203-12. PMID 25014686. https://pubmed.ncbi.nlm.nih.gov/25014686/
- Sim MG, Teo YN, Teo YH, et al. Association Between Calcium Supplementation and the Risk of Cardiovascular Disease and Stroke: A Systematic Review and Meta-Analysis. Heart Lung Circ. 2023;32(10):1230-1239. PMID 37743221. https://pubmed.ncbi.nlm.nih.gov/37743221/
- Recker RR. Calcium absorption and achlorhydria. N Engl J Med. 1985;313(2):70-3. PMID 4000241. https://pubmed.ncbi.nlm.nih.gov/4000241/
- Khalaf D, Krüger M, Wehland M, Infanger M, Grimm D. The Effects of Oral l-Arginine and l-Citrulline Supplementation on Blood Pressure. Nutrients. 2019;11(7):1679. PMID 31336573. https://pubmed.ncbi.nlm.nih.gov/31336573/
- Greer BK, Jones BT. Acute arginine supplementation fails to improve muscle endurance or affect blood pressure responses to resistance training. J Strength Cond Res. 2011;25(7):1789-94. PMID 21399536. https://pubmed.ncbi.nlm.nih.gov/21399536/
- Li A, Li H, Chen J. The effects of L-citrulline supplementation on cerebrovascular function during sprint interval training in taekwondo athletes. J Exerc Sci Fit. 2025;23(3):222-228. PMID 40474881. https://pubmed.ncbi.nlm.nih.gov/40474881/
- Ramos-Hernández R, Pascual-Fernández J, Álvarez-Pardo S, et al. Short-term citrulline malate supplementation enhances lower-limb function in physically active older women: A pilot randomized controlled trial. Clin Nutr ESPEN. 2026;74:103356. PMID 42162613. https://pubmed.ncbi.nlm.nih.gov/42162613/
- Using Dietary Supplements Wisely. National Center for Complementary and Integrative Health, National Institutes of Health. https://www.nccih.nih.gov/health/using-dietary-supplements-wisely
- Questions and Answers on Dietary Supplements. U.S. Food and Drug Administration. https://www.fda.gov/food/information-consumers-using-dietary-supplements/questions-and-answers-dietary-supplements
Order Memodyne once the interaction question is settled
One conversation with a prescriber covers it, and it is worth having before the first capsule rather than after the first fortnight.
Two bottles $158 · six bottles $294 · 60 days from purchase
Order Memodyne From This ShopLot MEM-26/ME-6233 · 30 capsules, one each morning · dispatched from within the United States
