A practical reference on Investigational drug: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2025-09-20 and is reviewed periodically as new material appears.
GW501516 acts on PPARδ, a nuclear receptor that helps regulate fatty acid oxidation and energy homeostasis. In animal studies, activation of this receptor was associated with increased endurance and changes in lipid metabolism. Human trials examined effects on blood lipids and other metabolic markers, but the compound did not advance to approval. Rodent studies later reported tumors in multiple tissues at doses used in those experiments. Whether those findings translate to human risk remains uncertain, and the clinical relevance of the animal data is still debated.
Regulatory bodies treat GW501516 as a prohibited substance in competitive sport. The World Anti-Doping Agency added it to the prohibited list, and it falls under classes covering metabolic modulators and hormone-related agents. It is not approved by drug regulators for human use, and it is not a lawful dietary supplement. Products sold under the cardarine name may contain unlisted ingredients or different compounds. Because no approved product exists, quality and identity are not guaranteed by pharmaceutical manufacturing standards.
Cardarine is a common name for the investigational chemical GW501516, also written GW-1516. It was developed as a peroxisome proliferator-activated receptor delta agonist for metabolic conditions such as dyslipidemia. Early research focused on lipid handling and energy use in skeletal muscle and other tissues. The compound was never approved as a medicine. In public discussion, it is often grouped with performance-enhancing substances, although its receptor target differs from that of anabolic steroids or selective androgen receptor modulators. Regulatory and health authorities have issued warnings about its use.
Legal status varies by country. In some places, cardarine is controlled under medicines or psychoactive substances laws; in others, it may be sold with minimal oversight as a research chemical. Customs agencies have intercepted shipments, and several national health agencies have issued warnings about products marketed for bodybuilding or performance enhancement. The lack of a standardized pharmaceutical supply means identity, purity, and contamination levels can differ widely between samples. These factors make cardarine a regulatory and public health concern rather than a conventional prescription drug.
Cardarine is a common name for GW501516, a synthetic compound first described in the 1990s as a selective agonist of the peroxisome proliferator-activated receptor delta. It was studied in preclinical models for metabolic and cardiovascular conditions, but it has not been approved as a medicine in the United States, Europe, or other major jurisdictions. Retail products labeled as cardarine are generally research chemicals or supplements, not pharmaceutical formulations. Because human safety and efficacy data remain limited, regulatory agencies treat it as an unapproved substance rather than a therapeutic product.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Common internet and media name. |
| Research code | GW501516 | Also written GW-1516. |
| Drug class | PPARδ agonist | Not a selective androgen receptor modulator. |
| Development status | Discontinued | Clinical development halted after rodent cancer findings. |
| Regulatory status | Prohibited in sport | Listed by WADA; not approved as medicine. |
== Animal models == Four different mouse models with COL3A1 defects have been reported. Inactivation of the murine COL3A1 gene using homologous recombination technique led to a shorter life span in homozygous mutant mice. The mice died prematurely from a rupture of major arteries mimicking the human vEDS phenotype. These mice also had a severe malformation of the brain. Another study discovered mice with a naturally occurring large deletion of the COL3A1 gene. These mice died suddenly due to thoracic aortic dissections. The third type of mutant mice were transgenic mice with a Gly182Ser mutation. These mice developed severe skin wounds, demonstrated vascular fragility in the form of reduced tensile strength and died prematurely at the age of 13–14 weeks. The fourth mouse model with defective COL3A1 gene is the tight skin mouse (Tsk2/+), which resembles the human systemic sclerosis.
As a consequence of the initial competing claims of discovery, an element naming controversy arose. Since the Soviets claimed to have first detected the new element they suggested the name kurchatovium (Ku) in honor of Igor Kurchatov (1903–1960), former head of Soviet nuclear research. This name had been used in books of the Soviet Bloc as the official name of the element. The Americans, however, proposed rutherfordium (Rf) for the new element to honor New Zealand physicist Ernest Rutherford, who is known as the "father" of nuclear physics. In 1992, the IUPAC/IUPAP Transfermium Working Group (TWG) assessed the claims of discovery and concluded that both teams provided contemporaneous evidence to the synthesis of element 104 in 1969, and that credit should be shared between the two groups. In particular, this involved the TWG performing a new retrospective reanalysis of the Russian work in the face of the later-discovered fact that there is no 0.3-second isotope of element 104: they reinterpreted the Dubna results as having been caused by a spontaneous fission branch of 259Rf. The American group wrote a scathing response to the findings of the TWG, stating that they had given too much emphasis on the results from the Dubna group. In particular they pointed out that the Russian group had altered the details of their claims several times over a period of 20 years, a fact that the Russian team does not deny.
Vancomycin, an intravenous antibiotic for treatment of complicated skin infections, bloodstream infections, endocarditis, bone and joint infections, and meningitis. Alteplase, an intravenous "blood clot buster" used for treatment of ischemic stroke. Carmustine, a chemotherapy drug used for treatment of glioblastoma, brainstem glioma, and other brain tumors.
=== Chinese involvement === Two China based companies were sanctioned by America in 2024 for providing "dual-use materials and components needed to manufacture, maintain, and deploy an arsenal of advanced missiles and unmanned aerial vehicles (UAVs) against U.S. and allied interests." A report by the Foundation for Defense of Democracies stated that the Houthis were using weapons made in China for their attacks on shipping in the Red Sea in exchange for Chinese ships having safe passage through the Sea. Another report from Israel's i24 News stated that China provided the Houthis with "advanced components and guidance equipment" for their missiles. The Institute for the Study of War reported that the Houthis supplement their weaponry through additional arms and dual use components sourced from Russia or China. For example, Yemeni border customs seized 800 Chinese-made drone propellers in a shipment bound for the Houthis, and in August 2024 had also purchased Hydrogen Fuel Cylinders from Chinese suppliers which aimed to increase the range and payloads of the Houthis' drones. According to The Wall Street Journal, the Houthis sent a group from Saada to Beijing to study Mandarin and manage the supply of drones and missile guidance systems from China and Hong Kong to Yemen. According to the United States Department of State, Chinese state-owned Chang Guang Satellite Technology Corporation has provided geospatial intelligence to the Houthis to target U.S. warships in the Red Sea.
=== Visible light === Optical radiation of any kind with enough intensity can cause damage to the eyes and skin including photoconjunctivitis and photokeratitis. Researchers have questioned whether limiting blue light exposure could reduce the risk of age-related macular degeneration. According to the American Academy of Ophthalmology, there is no scientific evidence showing that exposure to blue light emitting devices result in eye damage. According to Harriet Hall, blue light exposure is reported to suppress the production of melatonin, which affects our body's circadian rhythm and can decrease sleep quality. It is reported that, in reproductive-age females, bright light therapy may activate the production of reproductive hormones, such as luteinizing hormone, follicle-stimulating hormone, and estradiol Modern phototherapy lamps used in the treatment of seasonal affective disorder and sleep disorders either filter out or do not emit ultraviolet light and are considered safe and effective for the intended purpose, as long as photosensitizing drugs are not being taken at the same time and in the absence of any existing eye conditions. Light therapy is a mood altering treatment, and just as with drug treatments, there is a possibility of triggering a manic state from a depressive state, causing anxiety and other side effects. While these side effects are usually controllable, it is recommended that patients undertake light therapy under the supervision of an experienced clinician, rather than attempting to self-medicate.
Sources: en.wikipedia.org
== Chemistry == The structure of nicotinamide consists of a pyridine ring to which a primary amide group is attached in the meta position. It is an amide of nicotinic acid. As an aromatic compound, it undergoes electrophilic substitution reactions and transformations of its two functional groups. Examples of these reactions reported in Organic Syntheses include the preparation of 2-chloronicotinonitrile by a two-step process via the N-oxide,
An appeal was issued to the workers of the other East European countries, urging them to follow in the footsteps of Solidarity. To the Soviets, the gathering was an "anti-socialist and anti-Soviet orgy" and the Polish communist leaders, increasingly led by Jaruzelski and General Czesław Kiszczak, were ready to apply force. In October 1981, Jaruzelski was named first secretary of the PZPR. The Plenum's vote was 180 to 4, and he kept his government posts. Jaruzelski asked parliament to ban strikes and allow him to exercise extraordinary powers, but when neither request was granted, he decided to proceed with his plans anyway.
=== Scoville heat units === Compared with other chillies, the jalapeño heat level varies from mild to hot depending on cultivation and preparation and can have from a few thousand to over 10,000 Scoville heat units. The number of scars on the pepper, which appear as small brown lines, called 'corking', has a positive correlation with heat level, as growing conditions which increase heat level also cause the pepper to form scars. For US consumer markets, 'corking' is considered unattractive; however, in other markets, it is a favored trait, particularly in pickled or oil-preserved jalapeños. The heat level of jalapeños varies even for fruit from the same plant; however, some cultivars have been bred to be generally milder, and on the low side of the heat range, such as the 'TAM Milds' and 'Dulcito', and others to be generally hotter, and on the high end of the heat range, such as 'Grande'. As the peppers ripen their pungency increases, making red jalapeños to be generally hotter than green jalapeños, at least of the same variety. If the jalapeño plants were stressed by increased water salinity, erratic watering, temperature, light, soil nutrition, insects, or illness, this will increase their pungency. All of the capsaicin and related compounds are concentrated in vesicles found in the placenta membrane surrounding the seeds; the vesicles appear white or yellow and fluoresce in the range of 530 to 600 nm when placed in violet light.
==== Microspheres ==== An aqueous suspension of progesterone encapsulated in microspheres is marketed for use by intramuscular injection under the brand name ProSphere in Mexico. It is administered once weekly or once monthly, depending on the indication. For instance, the medication is administered at a dose of 100 to 300 mg by intramuscular injection once every 7 days for the treatment of threatened miscarriage. The microspheres range in size from 33 to 75 μg and are delivered using pre-filled syringes with a 20-gauge 38 mm needle. Peak levels of progesterone after a single 100 or 200 mg intramuscular injection of ProSphere occur after about 1.5 days. The elimination half-life of progesterone with this formulation is about 8 days. A single 200 mg intramuscular injection maintains progesterone levels of more than 10 ng/mL for 5 to 7 days. ProSphere is well tolerated in terms of injection site reactions. A combination of both estradiol and progesterone encapsulated within microspheres as an aqueous suspension for use by intramuscular injection has been marketed under the brand name Juvenum in Mexico. Studies of this formulation have been published. Estradiol and progesterone encapsulated in microspheres has been studied for use as a once-a-month combined injectable contraceptive but has not been further developed nor introduced for medical use.
Sources: en.wikipedia.org
In 1952, couple and amateur ethnomycologists R. Gordon Wasson and Valentina Wasson learned of the ritual use of hallucinogenic mushrooms in the 16th century in Mexico from the published work of Schultes. They made several trips to Mexico in search of the mushrooms. In mid-1955, the Wassons participated in a mushroom ceremony with Mazatec curandera Maria Sabina in Huautla de Jiménez, Oaxaca, Mexico. Gordon Wasson published his experience in an article for Life magazine titled "Seeking the Magic Mushroom" in 1957, while Valentina Wasson published her experience as "I Ate the Sacred Mushroom" in This Week magazine the same year. Later in 1957, a second expedition was made by the Wassons to Mexico with French mycologist Roger Heim. Heim identified several of the mushrooms as belonging to the genus Psilocybe. They collected samples of the mushrooms and Heim sent a sample to Hofmann. Hofmann identified psilocybin as the active constituent in 1958 and developed a chemical synthesis for it. Sandoz Pharmaceuticals began distributing tablets of psilocybin under the brand name Indocybin in 1960. French scientists Césaire Phisalix and Gabriel Bertrand isolated bufotenin from Bufo toads in 1893 and named it. The compound was first isolated to purity by Austrian chemist Hans Handovsky in 1920. Clinical studies assessed the effects of bufotenin and were published starting in 1956. However, the findings of these studies were conflicting, and bufotenin developed a long-standing reputation of being inactive and toxic.
== Early life == Watson was educated at Xavier College in Kew. From years five to eight he attended Xavier's Kostka Hall junior campus in Brighton. He played junior football with the East Sandringham Junior Football Club and the Sandringham Dragons in the TAC Cup. His father Tim played 307 games for Essendon from 1977 to 1994, playing in three premierships with the club, and captained Essendon from 1989 to 1991, before coaching St Kilda from 1999 to 2000; he is currently a commentator for the Seven Network.
For infants, non-pharmacological methods such as the use of a comfortable, padded chair and a sucrose or non-sucrose pacifier are more effective at reducing pain than a placebo, but the American Academy of Pediatrics (AAP) states that such methods are insufficient alone and should be used to supplement more effective techniques. A quicker procedure reduces duration of pain; use of the Mogen clamp was found to result in a shorter procedure time and less pain-induced stress than the use of the Gomco clamp or the Plastibell. The available evidence does not indicate that post-procedure pain management is needed. Some doctors recommend the use of petroleum jelly to prevent blood from adhering the genitals to the diaper during healing. For adults, topical anesthesia, ring block, dorsal penile nerve block (DPNB) and general anesthesia are all options, and the procedure requires four to six weeks of abstinence from masturbation or intercourse to allow the wound to heal.
Sources: en.wikipedia.org
No. Cardarine is a PPARδ agonist, while selective androgen receptor modulators act on androgen receptors. The two classes differ in receptor target and downstream effects.
Preclinical rodent studies reported cancers, including liver and bladder tumors, at tested doses. The human relevance of those findings is uncertain, but development was discontinued. No approved human product resulted.
No. It remains an investigational compound without approved therapeutic labeling. Sports regulators prohibit its use, and health agencies have warned against consuming it.
No. Major drug regulators have not approved GW501516 for treating any medical condition. Products sold as cardarine are typically unapproved research chemicals or supplements, so their contents and safety are not assured.