STADA Viagra(Sildenafil)Sex CAS:139755-83-2
Viagra, generically known as sildenafil citrate, revolutionized the treatment of erectile dysfunction (ED) upon its FDA approval in 1998. While tablets dominate the market, sildenafil liquid—a less conventional formulation—offers unique advantages for specific populations. This guide explores the science, applications, and nuances of sildenafil liquid, emphasizing its distinct pharmacokinetics, dosing flexibility, and clinical relevance.
What Is Sildenafil Liquid?
Sildenafil liquid is an oral suspension containing the same active ingredient as Viagra tablets but dissolved in a liquid medium. It is often compounded by pharmacies for patients who struggle with swallowing pills or require precise dose adjustments. Unlike tablets, which come in fixed doses (25 mg, 50 mg, 100 mg), the liquid form allows for micro-dosing, making it ideal for pediatric use (e.g., pulmonary hypertension) or adults with metabolic impairments.
Key Features:
●Rapid Absorption: Liquid formulations bypass the disintegration phase of tablets, leading to faster onset-sometimes within 15–20 minutes.
●Customizable Dosing: Enables titration to doses as low as 5 mg, reducing side effects in sensitive patients.
●Excipients: Often contains flavoring agents (e.g., cherry, vanilla) to mask sildenafil's bitter taste, improving compliance.
●Storage: Typically requires refrigeration to maintain stability, unlike tablets.
Mechanism of Action
Sildenafil selectively inhibits phosphodiesterase type 5 (PDE5), an enzyme that breaks down cyclic guanosine monophosphate (cGMP). By preserving cGMP in penile smooth muscle, nitric oxide (released during sexual stimulation) triggers vasodilation, enhancing blood flow to the corpus cavernosum. This mechanism remains identical across formulations, but the liquid's pharmacokinetics alter its clinical profile.
Applications
1.Erectile Dysfunction (ED):
●Primary use, aiding men with organic or psychogenic ED.
●Liquid form benefits those with dysphagia (e.g., stroke survivors, elderly).
2.Arterial Hypertension (PAH):
●FDA-approved under the brand name Revatio® (20 mg/mL).
●Improves exercise capacity by relaxing pulmonary vasculature.
3.Off-Label Uses:
●Altitude Sickness: Enhances oxygen saturation by dilating pulmonary vessels.
●Raynaud's Phenomenon: Mitigates digital vasospasms.
Benefits Over Tablets
●Faster Onset: Absorption begins immediately in the oral mucosa, bypassing gastric delays.
●Precision Dosing: Critical for pediatric PAH or patients with hepatic impairment.
●Enhanced Compliance: Preferred in pediatric, geriatric, or neurologically impaired populations.
●Versatility: Can be mixed with soft foods or beverages for discreet administration.
Dosage Guidelines
●ED: 25–100 mg taken 30–60 minutes pre-activity. Liquid allows incremental adjustments (e.g., 0.5 mL of a 20 mg/mL solution = 10 mg).
●PAH: 5–20 mg three times daily (pediatrics) or 20 mg thrice daily (adults).
●Renal/Hepatic Impairment: Start at 25 mg (ED) or 5 mg (PAH) and titrate cautiously.
Administration Tips:
●Avoid high-fat meals, which delay absorption.
●Use an oral syringe for accuracy.
Cycle and Duration
Unlike anabolic steroids, sildenafil isn't "cycled." However, its usage pattern depends on the condition:
●ED: On-demand use (30–60 minutes before intercourse).
●PAH: Chronic, scheduled dosing (e.g., every 8 hours).
Half-Life:
●3–5 hours in healthy adults.
●Prolonged in hepatic impairment (up to 12 hours).
●Active metabolites (N-desmethyl sildenafil) contribute to effects lasting 4–6 hours.
Patient Therapeutic Compliance (PTC)
Adherence challenges in chronic conditions (e.g., PAH) are mitigated by:
●Ease of Use: No need to swallow pills.
●Taste Masking: Flavored liquids improve acceptance.
●Dosing Flexibility: Adjustments based on tolerance or efficacy.
Factors Affecting Compliance:
●Cost (compounded liquids may lack insurance coverage).
●Refrigeration requirements.
●Social stigma (especially in younger PAH patients).
Safety and Side Effects
●Common: Headache (16%), flushing (10%), dyspepsia (7%).
●Serious: Priapism (rare), sudden hearing loss, vision changes (NAION).
●Contraindications: Concomitant nitrate or riociguat use (risk of hypotension).
Drug Interactions:
●Alpha-Blockers: Synergistic hypotension (space doses by 4 hours).
●CYP3A4 Inhibitors (e.g., ketoconazole): Increase sildenafil exposure.
Compounding and Regulation
Most sildenafil liquids are compounded under USP <795> guidelines. Quality varies, necessitating reliance on reputable pharmacies. The FDA has issued warnings about unregulated online products containing incorrect dosages or contaminants.
Novel Insights and Research
●Pediatric PAH: Studies show improved hemodynamics with liquid sildenafil in neonates.
●Neuroprotective Effects: Emerging research in Alzheimer's models suggests PDE5 inhibition may reduce tau phosphorylation.
●Women's Health: Investigational for sexual arousal disorders, though efficacy remains unproven.
Clinical Data
|
Brand |
STADA |
| Trade names |
Sildenafil |
|
CAS |
139755-83-2 |
|
Molar mass |
474.6 |
|
Formula |
C22H30N6O4S |
|
Purity |
Above 98% |
|
Apprarance |
30mls 100mg |
Any needs, please contact us
Email: Jasonraws106@gmail.com
WhatsApp: +86-15572565525
Telegram: +86-19128233885
Conclusion
Sildenafil liquid merges pharmacological innovation with patient-centric care, offering tailored solutions for ED, PAH, and beyond. Its rapid action, dosing precision, and adaptability underscore its value in diverse clinical scenarios. However, medical supervision remains paramount to balance efficacy and safety.
Hot Tags: STADA Viagra(Sildenafil)Sex CAS:139755-83-2, China STADA Viagra(Sildenafil)Sex CAS:139755-83-2 manufacturers, suppliers, factory
