Naltrexone is an enigmatic treatment whose benefits vary depending on which dosage you’re receiving. Just by the name alone, we can tell that Low Dose Naltrexone (LDN) is on the lower end of the dosing range, and its ideal use differs greatly from higher doses, particularly in how it affects longevity.
But the name shouldn’t suggest that there’s a single dose of LDN that’s considered the low dose. In fact, anything under 10mg of Naltrexone can be considered LDN.
This begs the question: just how low do the doses go, and which dose is right for me?
These questions are what drove us at AgelessRx to offer multiple starting doses for LDN. Below, we discuss the differences between these starting doses (0.5mg and 1.5mg), so you can make the most informed decision with your prescriber about what might be best for you. Here’s what to know before you buy LDN.
Key takeaways:
- LDN refers to any Naltrexone dose under 10 mg, with 4.5 mg/day as the most common target
- The 1.5 mg starting protocol reaches full dose faster; the 0.5 mg protocol titrates more slowly for sensitive users
- Most people begin feeling LDN benefits around 3.0 mg/day, regardless of which protocol they start on
- Choose 0.5 mg if you are medication-sensitive, have stopped LDN before, or have mast cell disorder, chronic Lyme disease, or frequent migraines
- AgelessRx offers both starting doses and allows clinicians to adjust titration schedules based on how the body responds
Why the Low Dose?
Many medications have different effects (and therefore different uses) when prescribed at higher or lower doses, and LDN is no exception.
Naltrexone is most often prescribed to treat certain addictions at doses ranging from 50-150mg. When prescribed at these doses, Naltrexone acts as an antagonist to temporarily block the effects of certain drugs and naturally occurring dopamine, as well as the release of dopamine (the reward signal associated with drug addiction).
When used at lower doses, though, Naltrexone appears to have a paradoxical effect that allows the brain to produce more endorphins, which help to improve pain relief. Lower doses of Naltrexone may also prevent overactivation of immune cells in the body and the brain (known as T-cells and microglia respectively), thereby blunting the destructive consequences of chronic inflammation.
For these benefits, Naltrexone is prescribed at 9mg/day or under. The most common dose is usually 4.5mg/day, at which most users experience the greatest benefits with the least risk of side effects. This immune-modulating action is what makes LDN a compound of active interest in longevity research, studied as a potential gerotherapeutic agent: one that may help modify the aging process at a cellular level, rather than treating only a single diagnosed condition.
What Are the Doses for LDN?
This is the most common concern we hear when asked what to know before you buy LDN. One thing to keep in mind is that 4.5 mg/day is the optimal dose for most users, when they reap the most benefits with minimal (if any) side effects after a period of titrating up from even lower doses. For 4.5 mg/day, users will start at 1.5 mg/day, which is the standard starting dose offered at AgelessRx.
Now when we say “most users,” we mean that 4.5mg/day isn’t necessarily the most beneficial dose for everyone. Some may find that higher doses are best for them, but often, we find our subscribers ask for even lower doses, both as a starting point and as their ultimate, therapeutic dose.
That’s why we introduced the 0.5 mg LDN Protocol as a new starting point for LDN. This way, those who are interested in starting LDN can still experience the benefits, without risking side effects that may occur by starting with too much, too quick.
What’s the Difference?
The main differences between the 0.5 mg and 1.5 mg LDN Protocols include the starting doses, the titration plan, and the threshold for when users can expect to feel benefits, providing an opportunity for increased precision and personalization.
LDN Doses & Titration
The 1.5 mg LDN Protocol is the de facto standard for longevity benefits with the simplest titration plan.
If you elect the 1.5 mg Protocol, you will receive 1.5 mg capsules and take 1 each night before bed for the first 10 days. You will then increase your dosage to 2 capsules (3.0 mg total) each night for another 10 days, before finally capping the dose at 3 capsules each night (4.5 mg total).
Standard Titration Schedule
|
Week |
Strength |
Caps per Dose |
|---|---|---|
|
1 |
1.5 |
1 |
|
2 |
1.5 |
2 |
|
3+ |
1.5 |
3 |
The 0.5 mg LDN Protocol is, by comparison, more complicated. It has more dose adjustments to track and a longer titration period. But this protocol also allows for much greater flexibility. It gives users more control to notice how LDN affects the body at each dose level.
Slower Titration Schedule
|
Week |
Strength |
Caps per Dose |
|---|---|---|
|
1-2 |
0.5 |
1 |
|
3-4 |
0.5 |
2 |
|
5-6 |
0.5 |
3 |
|
7-8 |
0.5 |
4 |
|
9-10 |
0.5 |
5 |
|
11-13 |
0.5 |
6 |
|
14+ |
1.5 |
3 |
Should you choose the 0.5 mg Protocol, you will receive 0.5 mg capsules and take 1 each night before bed for the first 14 days. You will then continue to increase the capsules you take each night by 1 every 14 days, until you reach 6 capsules each night, or 3.0 mg/day. At this point, you will start receiving 1.5 mg capsules and cap your dose at 3 capsules each night, or 4.5 mg/day.
Benefits & Side Effects
In the experience of our prescribers, most start to feel the benefits of LDN when they reach a dose of about 3.0 mg/day, with the max dose of 4.5 mg/day reducing symptoms even further. Those on the 0.5mg LDN Protocol may have to wait several more weeks to experience benefits like pain reduction.
By contrast, those on the 1.5 mg LDN Protocol may also have to tolerate more noticeable but temporary side effects (that is, headache, upset stomach, restless sleep) that can occur from taking greater doses within a shorter period of time. The 0.5 mg LDN Protocol is designed to give the body the best chance at tolerating the medication by gradually introducing smaller doses over a longer period.
Which Protocol Is Right for Me?
Starting with 1.5 mg/day is the standard for LDN and gives you the best opportunity to experience the full benefits as quickly and safely as possible.
So, we recommend starting with the 1.5 mg LDN Protocol, unless:
- You have taken LDN before and stopped, especially if you found you could not tolerate the side effects.
- You are generally sensitive to medications, or if you commonly have bad reactions to a variety of medications. This doesn’t have to be an allergy.
- You have been diagnosed with one of the following: mast cell disorder (MCAS), chronic mold toxicity syndrome, chronic Lyme disease (or related co-infection disorders) or chronic/frequent migraines. Any of these may make it difficult to tolerate the 1.5mg LDN Protocol.
What If I Want a Different Dose?
If we can say one thing about what to know before you buy LDN, it’s that finding the best LDN dose for you can be difficult. Though we’ve taken great care to develop protocols that match most users’ needs, the fact is that everyone experiences medication differently, so no single dose is ideal for 100% of users.
We encourage all subscribers to move forward with their selected protocol, but take care to listen to the body during titration. Are you feeling the benefits you were expecting? Or are the side effects getting in the way?
If you find that it’s difficult to ramp up your LDN dosage as scheduled, let your prescriber know: we can always modify your schedule so your body has more time to adjust, or even keep you at your current dose until you’re ready.
What matters most is finding a protocol that supports long-term health, and that takes iteration. We approach LDN dosing through a science-led, personalized lens, using clinical evidence and subscriber response data to guide decisions over time. If titration becomes difficult or a different pace is needed, the clinical team can adjust the schedule accordingly.
Frequently Asked Questions
LDN works by gently modulating the immune system and reducing inflammation in the body. It temporarily blocks endorphin receptors, which encourages the body to produce more endorphins. Endorphins are natural chemicals that help manage pain, mood, and immune function. Because of these effects, LDN is used to support overall health, improve quality of life, and help manage chronic conditions, all without suppressing the immune system.
LDN can be taken in the morning or at night. It really comes down to personal preference and how the body responds. Some people prefer taking it at night to support natural endorphin production during sleep, while others find morning dosing works better, especially if they experience vivid dreams or sleep disruptions. That being said, there’s no one-size-fits-all approach: listen to how the body responds during the first weeks and dose accordingly.
Yes! While many users eventually titrate up to 4.5mg, some feel their best at lower doses and choose to stay there. LDN dosing is highly individual: what matters is how the body responds, not chasing a specific number.
Mild side effects like headaches, nausea, or vivid dreams are common when adjusting doses. If they become disruptive, it’s perfectly fine to pause your titration, stay at your current dose longer, or lower the dose.
Note: The above statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.