Selegiline, and where to find it

Supplements
#1

Looking to find an outlet that sells it
AND accepts credit cards.
(Signing up for bitcoin is crazy-making
It’s also called Deprenyl

#2

See this list: Buy Rapamycin Online - List of Reliable Pharmacies

#3

Can selegiline, cabergoline, and rapamycin be refrigerated?

#4

Google Gemin or Claude is your friend…

Prompt:

Role: pharmacologist. Task: Identify whether Can selegiline, cabergoline, and rapamycin be refrigerated, and if so what is the best approach and packaging?

Gemini Response:

When evaluating the physiochemical stability of selegiline, cabergoline, and rapamycin (sirolimus), refrigeration is often improperly used as a blanket method to extend shelf life. While lowering temperature slows kinetic degradation, the introduction of relative humidity and condensation poses a significantly higher threat to solid oral dosage forms than room-temperature heat.

Here is the objective breakdown of how these compounds react to cold storage.

1. Selegiline Hydrochloride

Selegiline is an irreversible monoamine oxidase-B (MAO-B) inhibitor.

  • Refrigeration Viability: No for commercial tablets. Yes for raw chemical powder under strict containment.
  • The Mechanism: Commercial selegiline HCl tablets are highly vulnerable to moisture-driven degradation. Elevated humidity accelerates the breakdown of the molecule into its primary degradants: methamphetamine and amphetamine.
  • The Data: Stability testing shows that at controlled room temperature (25 degrees C / 60% relative humidity), selegiline tablets maintain their shelf life before methamphetamine levels cross the critical 0.5% degradation threshold. Under accelerated stress conditions (40 degrees C / 75% relative humidity), this 0.5% threshold is breached in just 3 months.
  • The Reality: Refrigerating commercial blister packs or loose tablets introduces a high risk of micro-condensation upon opening, which rapidly drives the exact hydrolytic degradation pathways you are trying to avoid.

2. Cabergoline

Cabergoline is an ergot-derived dopamine D2 receptor agonist. Because it is typically dosed in microgram quantities (0.25 mg to 0.5 mg), minor chemical degradation causes an immediate drop in therapeutic potency.

  • Refrigeration Viability: Strictly discouraged for commercial tablets.
  • The Mechanism: Cabergoline is exceptionally hygroscopic (moisture-absorbing) and photosensitive. Official prescribing instructions mandate storage at controlled room temperature (20 to 25 degrees C) and explicitly state it must be kept in its original glass bottle with a specialized desiccant cap.
  • The Reality: Moving cabergoline to a standard refrigerator exposes it to a high-humidity environment. Repeatedly opening the container at room temperature causes ambient moisture to condense onto the cold interior walls and the tablets. This initiates rapid hydrolytic cleaving of the ergot ring structure, rendering the compound inactive.

3. Rapamycin (Sirolimus)

Rapamycin is a macrolide lactone that acts as a selective mTORC1 inhibitor. Its stability depends entirely on the specific formulation.

  • Refrigeration Viability: Mandatory for oral solutions. Optional but highly conditional for tablets.
  • Oral Solution: Sirolimus oral solution (1 mg/mL) must be refrigerated at 2 to 8 degrees C and protected from light. Once opened, it undergoes rapid oxidative degradation within its liquid vehicle and must be discarded within 30 days.
  • Solid Tablets: Commercial tablets are engineered for controlled room temperature (20 to 25 degrees C). Rapamycin features a triene conjugated structure that makes it highly vulnerable to photolytic degradation. Unpackaged tablets exposed to UV or visible light show up to a 12% loss in potency within 5 days.
  • The Reality: Refrigeration will not extend the lifespan of rapamycin tablets beyond their labeled 24-to-36-month expiration date unless you use a rigorous barrier technique to completely isolate them from moisture.

Target Protocol for Cold-Storage Preservation

If raw chemical powders are being archived, or if solid oral forms must undergo long-term cold storage for multi-year preservation, moisture exclusion must be treated as a hard engineering constraint.

The Packaging Stack

  1. Primary Layer: Keep tablets inside their factory foil blister packs. The aluminum laminate is the only effective barrier against oxygen and moisture transmission. Never punch tablets out into loose bottles.
  2. Secondary Layer: Place the blister sheets or original glass bottles inside a heavy-duty Mylar bag. Standard polyethylene Ziploc bags have a high moisture vapor transmission rate and are useless for long-term storage.
  3. Active Desiccant: Add an indicating Type A silica gel canister or packet inside the Mylar bag to scavenge latent moisture present in the headspace gas during sealing.
  4. Tertiary Layer: Vacuum-seal the outer layer and store it flat in a stable zone of the refrigerator, away from the door to prevent temperature fluctuations from thermal cycling.

The Acclimation Rule

When retrieving the compound from cold storage, do not break the vacuum seal or open the container immediately. The entire package must sit undisturbed at room temperature for at least 2 to 3 hours. This allows the internal temperature to cross back over the dew point, ensuring that ambient humidity does not condense onto the cold tablets when opened. Breaking the seal early destroys the compound via immediate moisture condensation.

#5

Sirolimus tablets should be stored at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature]. Dispense in a tight, light-resistant container as defined in the USP.

selegiline:Store at 20º to 25ºC (68º to 77Fº) [see USP Controlled Room Temperature].

cabergoline:Store at 20°C to 25°C (68°F to 77°F); excursions permitted between 15°C to 30°C (59°F to 86°F) [See USP Controlled Room Temperature].Dispense in original container.

AI models are prone to hallucinations, We must rely on the official product labels.

https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=a246b015-e19c-4b4f-9089-aea1108687ba

1 Like
#6

Cole! That you SO MUCH for this thorough, generous explication of how to use the 3 substances addressed above.
While I understand that these are hygroscopic when transferred from fridge to room temperature, what about those 3 substances placed in company-sent, individually-sealed, aluminum blister packs? Can these be refrigerated and taken individually?
Also, Once removed from the fridge, should the individually blister-sealed substance be put in room temp. and then ingested after they get to room temperature?
Again: Thank you SO Much for your indulgence in my questions!!!