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Sex Steroid Tadalafil / Cialis for Treating Erectile Dysfunction CAS 171596-29-5

Sex Steroid Tadalafil / Cialis for Treating Erectile Dysfunction CAS 171596-29-5

Brand Name: ChineseHormone
Certification: GMP, ISO 9001, USP
Model Number: CAS 171596-29-5
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Hengyang Desen Biotechnology Co., Ltd.
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Hengyang Hunan China
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NO. 26 Zhurong Road, Zhengxiang Discrit, Hengyang, Hu Nan Province, China
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Sex Steroid Tadalafil / Cialis for Treating Erectile Dysfunction CAS 171596-29-5


CAS No: 171596-29-5

Molecular Formula: C22H19N3O4

Molecular Weight: 389.341

Assay: 99.5%

Chemical structure:


Appearance: White powder, odorless, tasteless, insoluble in water and alcohol


Description:


Tadalafil is a PDE5 inhibitor marketed in pill form for treating erectile dysfunction (ED) Cialis and Adcirca are for the treatment of pulmonary arterial hypertension.
Although Sildenafil (Viagra), Vardenafil (Levitra), and Tadalafil all work by inhibiting PDE5, Tadalafil's pharmacologic distinction is that it has longer half-life (17.50 hours) - compared to Sildenafil (4.0-5.0 hours) and Vardenafil (4.0-5.0 hours) - resulting in longer duration of action, and so partly responsible for "The Weekend Pill" sobriquet. Furthermore, the longer half-life is the basis for current investigation of Tadalafil, because it can be used in relieving pulmonary arterial hypertension. Sildenafil is approved in several world regions as a thrice-daily therapy for pulmonary arterial hypertension.

Side effects


Tadalafil has been used in approximately 15,000 men participating in clinical trials, and over eight million men worldwide (primarily in the post-approval/post-marketing setting). The most common side effects when using tadalafil are headache, stomach discomfort or pain, indigestion, burping, acid reflux, back pain, muscle aches, flushing, and stuffy or runny nose.


These side effects reflect the ability of PDE5 inhibition to cause vasodilation (cause blood vessels to widen), and usually go away after a few hours. Back pain and muscle aches can occur 12 to 24 hours after taking the drug, and the symptom usually disappears after 48 hours.


In May 2005, the U.S. Food and Drug Administration found that tadalafil (along with other PDE5 inhibitors) was associated with vision impairment related to NAION (nonarteritic anterior ischemic optic neuropathy) in certain patients taking these drugs in the post-marketing (outside of clinical trials) setting. Most, but not all, of these patients had underlying anatomic or vascular risk factors for development of NAION unrelated to PDE5 use, including: low cup to disc ratio ("crowded disc"), age over 50, diabetes, hypertension, coronary artery disease, hyperlipidemia and smoking.


Given the small number of NAION events with PDE5 use (fewer than one in one million), the large number of users of PDE5 inhibitors (millions) and the fact that this event occurs in a similar population to those who do not take these medicines, the FDA concluded that they were not able to draw a cause and effect relationship, given these patients underlying vascular risk factors or anatomical defects. However, the label of all three PDE5 inhibitors was changed to alert clinicians to a possible association.


In October 2007, the FDA announced that the labeling for all PDE5 inhibitors, including tadalafil, requires a more prominent warning of the potential risk of sudden hearing loss as the result of postmarketing reports of deafness associated with use of PDE5 inhibitors


Drug interactions


Since PDE5 inhibitors such as tadalafil may cause transiently low blood pressure (hypotension), organic nitrates (poppers) should not be taken for at least 48 hours after taking the last dose of tadalafil. Using organic nitrites (such as the sex drug amyl nitrite) within this timeframe may increase the risk of life-threatening hypotension.


Since people who have taken tadalafil within the past 48 hours cannot take organic nitrates to relieve angina (such as glyceryl trinitrate spray), these patients should seek immediate medical attention if they experience anginal chest pain. In the event of a medical emergency, paramedics and medical personnel should be notified of any recent doses of tadalafil.


Tadalafil is metabolized predominantly by the hepatic CYP3A4 enzyme system. The presence of other drugs which induce this system can shorten tadalafil half-life and reduce serum levels, and hence efficacy, of the drug.


COA:


Test ItemsSpecificationTest Results
AppearanceWhite powderConforms
Test methodHigh pressure liquid chromatography(HPLC)Conforms
Melting Point300ºC~303ºC301.5ºC-302.6ºC
Loss on drying≤0.5%0.24%
Heavy metals(Pb)≤20ppm7.5ppm
Residue on ignition≤0.1%0.08%
Relative substance≤1.0%0.145%
Assay (on dried basis)≥98.5%99.33%
ConclusionThe product conform to USP 32.


Product Tags:

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male sex enhancer

      

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Sex Steroid Tadalafil / Cialis for Treating Erectile Dysfunction CAS 171596-29-5