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Sermorelin Dosing Schedule: Timing, Frequency and Cycles

Sermorelin Dosing Schedule: Timing, Frequency and Cycles

Geometric illustration of a dosing schedule

A sermorelin dosing schedule is set by a licensed provider, not by a chart. Most published schedules describe a small subcutaneous injection taken once at bedtime, on an empty stomach, either nightly or five nights per week, with the dose adjusted over several weeks. This article explains what those schedules look like, why the timing is chosen, where published numbers disagree, and which decisions belong to your prescriber.

The figures below are educational. They are not a prescription, and they should not be used to self-dose with product from an unverified source.

Vivo Clinicvivoclinic.orgGet Sermorelin Guidance From a ProviderVivo Clinic offers provider-supervised Sermorelin treatment with personalized selection and precision-compounded therapies from licensed U.S. pharmacies.Explore Sermorelin care

TL;DR

  • Sermorelin is usually injected subcutaneously once a day at bedtime, commonly on an empty stomach, to coincide with the body’s natural nighttime growth hormone release.
  • Published ranges for adults cluster around 200 to 300 mcg per dose, often starting lower and being adjusted by the provider based on response and labs. Sources vary, so the label on your own prescription governs.
  • Common patterns are nightly dosing or five nights on and two nights off, in cycles that clinics define differently.
  • Morning dosing, exercise timing and cycle length are provider decisions, and the evidence behind them is thinner than the evidence for bedtime dosing.
  • Sermorelin should come from a licensed pharmacy on a valid prescription, not from “research use” vendors.

Table of Contents

What a sermorelin schedule actually contains

Sermorelin is a synthetic fragment of growth hormone-releasing hormone (GHRH). It prompts the pituitary gland to release growth hormone, rather than supplying growth hormone directly. A complete schedule answers six separate questions:

  1. Dose per injection, usually in micrograms (mcg) or milligrams (mg) of drug, and the matching volume in the syringe.
  2. Frequency, meaning every night or a set number of nights per week.
  3. Time of day, relative to sleep and meals.
  4. Titration, meaning whether the dose starts low and steps up.
  5. Cycle length, meaning how long treatment runs before a planned review or break.
  6. Monitoring, meaning which symptoms and labs the provider checks to decide whether to change any of the above.

Published charts usually answer the first three and skip the last three. That gap is where most confusion starts.

Typical dose ranges and why sources disagree

The drug label information reproduced by medical references describes a once-daily bedtime subcutaneous injection. RxList’s monograph lists 0.2 to 0.3 mg once daily at bedtime, and the same page also contains a version of the sentence written as mcg, a unit slip that illustrates how easily figures get garbled online. 0.2 to 0.3 mg equals 200 to 300 mcg.

The pages that rank for this topic report similar numbers in different forms: starting doses of roughly 100 to 300 mcg, standard ranges of 200 to 500 mcg, and some bodybuilding-oriented pages quoting up to 1 mg. Those higher figures come from non-clinical sources, and a higher number is not better evidence. The Mayo Clinic drug information page is blunt about the principle: the dose differs between patients, and you should follow your doctor’s orders or the directions on the label.

Dimension What public references commonly describe Who decides in practice
Dose per injection About 200 to 300 mcg for many adults, sometimes starting lower Prescriber, based on history, labs and response
Frequency Nightly, or 5 nights per week Prescriber
Timing Bedtime, fasted Prescriber, with your sleep and meal pattern
Route Subcutaneous injection Prescriber and pharmacy formulation
Cycle length Varies widely, often described in months Prescriber, at scheduled reviews

Because compounded sermorelin is prepared at a specific concentration, the same dose can be a different number of syringe units depending on the vial. A “0.2 mL” instruction on one pharmacy’s vial is not the same amount of drug as 0.2 mL from a vial mixed at another concentration. Always follow the units and concentration printed on your own label, and ask your provider or the dispensing pharmacy to confirm the math if anything is unclear.

When to take sermorelin: the bedtime logic

The most common question readers type is when to take it, and the most consistent answer across references is bedtime. The reasoning is physiological. Growth hormone release is pulsatile, and a large pulse occurs in early deep sleep. Sermorelin is short-acting, so dosing shortly before sleep is meant to line up with that pulse rather than fight it.

Published human studies reflect this pattern. A summary of timing research from Evidence Based Longevity notes that the cited trials gave sermorelin under the skin either twice daily in one study or once nightly in another. So even in the literature, once-nightly injection is the reference pattern, not an arbitrary habit.

Fasting before the dose

Most schedules ask for an empty stomach. The commonly stated reason is that a rise in insulin after eating can blunt the growth hormone response. Typical instructions fall in a range of roughly one to two hours after the last meal, and the exact figure differs between sources and between clinics. That is a reason to follow the instruction on your own plan rather than adopting a number from the web. If you eat late, tell your provider, because the schedule may need to move earlier or the dinner time may need to change.

Sermorelin morning or night

Morning dosing appears in some patient schedules, usually because bedtime injections are hard to keep consistent. The tradeoff is that a morning dose no longer lines up with the sleep-associated pulse that bedtime dosing targets, and many people eat soon after waking, which conflicts with fasting guidance. If your routine makes a nighttime injection unrealistic, raise that with your provider instead of improvising. A schedule you can follow consistently is worth more than a theoretically ideal one you skip.

Exercise and sermorelin timing

There is no well-established, clinic-standard rule that links sermorelin timing to training. Most protocols anchor the dose to sleep, not to the workout. If you train late in the evening, the practical issues are food and hydration: a post-workout meal close to bedtime would conflict with the fasting window. Discuss your training schedule with your provider so the meal, the workout and the injection can be sequenced sensibly.

Nightly or five nights per week

Two patterns appear repeatedly in public dosing guides.

Nightly dosing. This follows the original label-style instruction of once daily at bedtime. It is simple to remember, and the habit is easy to build.

Five nights on, two nights off. Several clinical-style guides describe a 5-out-of-7 pattern, for example injecting Monday through Friday and skipping the weekend. The stated rationale is usually to give the pituitary a rest period and to simplify weekend routines. The evidence base for the intermittent pattern is mostly clinical convention, not head-to-head trials, so it should be treated as one prescriber’s option, not a requirement.

Comparison of nightly and five-night weekly schedules

A provider may choose either, and may switch between them at a review.

Titration: starting low and adjusting

Many schedules begin at a lower dose and increase gradually. A typical illustrative sequence in public guides is a first week or two at the lower end of the range, then a step up if the patient tolerates it and the provider wants a stronger response. These sequences are descriptions of common practice, not instructions, and different prescribers use different steps.

What changes a dose in a supervised program:

  • Side effects such as injection-site redness, flushing, headache or dizziness.
  • Changes in labs the provider follows, such as IGF-1, a growth hormone marker some clinicians monitor.
  • Age, weight, other medications and the specific goal of treatment.
  • Whether other therapies are being added.

Never raise your own dose because a chart says a higher number exists. Mayo Clinic’s guidance is explicit that you should not use more of the medicine, or use it more often, than your doctor ordered.

How long does a cycle last

Cycle length is where sources diverge most. Some guides describe three to six months of treatment with a planned review, and others describe 12 to 16 week blocks followed by a washout of six to eight weeks. Those are practitioner and community conventions, not regulatory standards. Whether three months is enough depends on what the provider is monitoring and what you and the provider agreed the goal would be. Ask at the start how and when progress will be assessed, so the end of a cycle is a planned decision and not a lapse.

Practical steps for each injection

Your pharmacy’s written instructions and your provider’s guidance override this list. In general:

  1. Wash your hands and check the label, the dose and the expiration or beyond-use date.
  2. Confirm the fasting window has been met.
  3. Use a new syringe and prepare the dose exactly as labeled.
  4. Inject subcutaneously, then rotate the site from night to night. Reference monographs recommend periodic site rotation.
  5. Dispose of needles in a sharps container.
  6. Store the vial as the label directs, usually refrigerated.

For general technique on subcutaneous pen and syringe sites, our article on injection sites and rotation covers the rotation principles in the context of another injectable.

Missed doses

Sermorelin has a very short half-life, so a missed night does not require doubling the next one. Do not inject two doses to catch up. Resume the schedule the next night, or the next scheduled night on a 5-on, 2-off pattern, and tell your provider if you miss several in a row. Your own prescription instructions take priority over this general description.

Where the sermorelin comes from matters

A schedule only means something if the product in the vial is what the label says. Two points are worth knowing.

First, brand-name sermorelin (Geref) is no longer marketed in the U.S., which is why current patients receive compounded preparations. That makes the pharmacy’s quality, licensing and testing central. Our post on who prescribes peptides in the U.S. explains how prescriber location affects the rules.

Second, “research use only” peptides are not a licensed alternative. The FDA has issued warning letters to companies marketing sermorelin as a research product with implied benefits for human use, including a December 2024 letter to Xcel Research LLC. Vials sold that way come without a prescriber, a dosing plan, or pharmacy-level oversight, so a published dosing chart cannot be safely applied to them.

Our perspective

We see the same pattern in questions about sermorelin: people search for a number, when the number is the least important part of the plan. A dose of 300 mcg means different things for different people, and it means something else again if the vial concentration differs from the chart’s assumption.

Our perspective — overview diagram

That is why we build the process around provider review first. A licensed provider reviews your history, selects the therapy, and sets the schedule. A licensed U.S. pharmacy prepares the compounded medication, and the product ships to your door. Ongoing oversight means the schedule is not fixed at the first order. It can be adjusted as you report how you feel and as your provider reviews the plan.

We also think patients are better served by plain explanations of why a schedule is built the way it is, such as bedtime timing, fasting and rest nights, than by a chart presented as a rule. Where the evidence is thin, as with morning dosing or exercise timing, we say so, and we defer to the prescriber’s judgment for the individual.

— Jack

Sermorelin through Vivo Clinic

Our sermorelin program is a compounded prescription therapy, available at 139 USD per month, with telehealth intake, provider review and ongoing supervision. Treatment is prescribed only after a provider approves it, and the schedule on your label comes from that provider. If you are weighing it against other options, our post on sermorelin compared with ipamorelin and the clinician-oriented comparison of CJC-1295 and sermorelin explain how these peptides differ.

Questions to bring to your provider

  • What dose and concentration is on my label, and how many syringe units is that?
  • Should I inject nightly or five nights per week?
  • How long after my last meal should I inject?
  • When will we review progress, and which labs or symptoms will we use?
  • What should I do after a missed dose?
  • What side effects should prompt me to call you, and which should send me to urgent care?

Seek urgent care for symptoms such as swelling of the face or throat, trouble breathing or a widespread rash after an injection, since these can signal a serious allergic reaction.

FAQ

How much sermorelin should I take per week?

That depends on the prescriber’s plan. A commonly published adult pattern is about 200 to 300 mcg per injection, given nightly (seven doses) or five nights per week (five doses). Your label sets the actual amount, and the concentration of your vial determines the syringe volume.

Is the best time to take sermorelin before bed?

Bedtime is the most widely described timing, taken on an empty stomach, because growth hormone release peaks during early sleep. Some patients use morning dosing for convenience, but that is a provider decision and it has less published support. Follow the timing on your plan.

Is 500 mcg of sermorelin a lot?

It is above the 200 to 300 mcg range that many references list for a typical adult dose, though some clinical guides cite ranges up to 500 mcg. Whether it is appropriate for a given person is a prescriber judgment. Do not move to a higher dose on your own.

Is three months of sermorelin enough?

There is no single answer. Public guides describe cycles from about three months to several months, with reviews along the way. Ask your provider what outcome you are tracking and when it will be reassessed, so the length of treatment is decided by data and not by a calendar alone.

Sources