Sildenafil citrate is a prescription drug used to treat erectile dysfunction. It works by helping to relax the blood vessels in the penis, which helps to increase blood flow. This medicine will only help you to get or maintain an erection if you are sexually stimulated.
Sildenafil Citrate is used to treat male sexual function problems, including impotence, erectile dysfunction, and decreased libido.
It should be noted that Sildenafil Citrate may have some potential side effects.
The following table gives an overview of the use of Sildenafil Citrate:
| Tablet Strength | Packing Size | Delivery Time |
|---|---|---|
| 20mg | 10 pills | 3-6 business days |
| 50mg | 20 pills | |
| 100mg | 30 pills |
Before taking Sildenafil Citrate,
It is important to tell your doctor or pharmacist about any medical conditions you have. This includes:
This information is for your general knowledge and does not replace medical advice. If you have any questions or concerns about Sildenafil Citrate, talk to your healthcare provider or pharmacist. Your doctor will be happy to talk to you in more detail.
Sildenafil citrate is typically used once a day. However, it can be taken up to 3 times a day, depending on your doctor's instructions.
The recommended dosage of Sildenafil citrate is 50 mg once daily. This medication should be taken on an empty stomach, with a light meal. It should be taken with food to avoid upset stomach or stomach bleeding.
It is important to follow the dosage instructions carefully. Do not take it more often than directed. If it is too much or too little, you should seek medical attention.
Sildenafil citrate may cause an overdose of the following medicines:
Taking this drug with nitrates (nitroglycerin) may cause a sudden and dangerous drop in blood pressure. You should not take it more than directed. If you have uncontrolled high blood pressure or are using medications that contain nitrates, avoid doing so.
If you are taking other medications that contain nitrates, or are taking alpha-blockers for prostate, you may be at risk of experiencing dangerous drops in blood pressure. You should seek medical attention right away if you experience any of these symptoms.
Sildenafil citrate, commonly known by the brand name, is a prescription-only medicine used to treat erectile dysfunction (ED) in adult men. It works by improving blood flow to the penis, helping to achieve and maintain an erection during sexual activity.
Sildenafil is available in 25mg, 50mg, and 100mg strengths.
Sildenafil has been shown to be effective in up to 80% of men with ED, with effects typically noticeable within 30 to 60 minutes, and lasting for up to 4–5 hours.
Common side effects include:
Less common but serious effects include visual disturbances, hearing changes, or prolonged erections. Seek medical attention if severe or persistent side effects occur.
Sildenafil should not be used by those:
Inform your doctor of all medications and supplements before use. Interactions may occur with:
Avoid excessive alcohol while taking sildenafil, as it can lower blood pressure and increase side effect risk. Use with caution if you have any heart-related conditions.
Sildenafil is available by prescription only in the UK.
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Viagra generic entryThe story of Viagra’s patents and generic entry of sildenafil citrate is a valuable one because it covers many of the nuances of drug patenting and generic entry in the United States.
This article will describe the multiple patents, patent term extension, pediatric extension, litigation, out-of-court-settlement, and authorized generic fighter brand elements which led to Viagra’s long patent life and limited early entry of generics, and Pfizer’s post generic-entry strategy to limit the impact of competitors.
was approved in 1998, and the original patent covering Viagra was, which received a 283-day patent term extension giving it an expiration date of March 29th, 2012. This 14-year patent life is longer than many other drugs, but Pfizer was able extend the patent-protected life even further.
The ‘534 patent was filed in 1990, and in 1994 (four years prior to Viagra’s launch) Pfizer filed a second patent:. Because the ‘012 patent was filed prior to June 8th 1995 its term is17 years from the grant date, rather than20 years from the filing date, which is how expiration is determined for patents filed after Jun 8th 1995. The ‘012 patent was granted on October 22nd, 2002, so the original expiration date was set to October 22nd, 2019 — more than twenty years after the drug’s launch. The patent’s expiration was extended to April 22nd 2020 because Pfizer responded to an FDA request to perform pediatric clinical trials, granting six months of “” protection.
Pfizer successfully defended Viagra’s patents in many over the years, but one lawsuit stands out. Despite prevailing in awhich affirmed the validity of patent 6,469,012, in 2013 Pfizer announced an, granting Teva a license to manufacture and sell genericstarting in December 2017, more than two years before Viagra’s patent expiration. Importantly, this was not a ‘‘ patent settlement, as Teva was required to pay Pfizer a licensing fee to produce the generic.
Generic drugs sell at a discount to the branded version, which hurts branded revenues, but there are things which brands can do to limit the impact. A popular tactic it to launch an. In this strategy the branded firm licenses a third party to market the branded drug under another name, compelling the generic entrant (in this case Teva) to compete in the generic market. The authorized generic for Viagra was and it was.
Viagra’s 2016 US sales were approximately 1.2 billion, and in 2017 they dropped to less than $800 million. With increased competition from Teva and from Revatio, revenues are expected to keep dropping, and widespread generic competition from the many companies with will further-decrease Viagra sales. It appears that Pfizer is responding to increased competition by increasing Viagra’s price — the has been a general increase over time.
The story of Viagra and the generic entry of sildenafil citrate illustrates the value of data and the need to continuously re-evaluate factors affecting generic entry. Reliance on the first patent would have vastly under-estimated the date of generic entry, and looking solely at the expiration date of the second patent would have missed the December 2017 generic entry. DrugPatentWatch offers the tools to continuously track patents covering drugs, litigations, tentative generic approvals, and other factors essential to making better decisions. For more information, and learn more about our.
Viagra patents –isperspSildenafil Citrate is a phosphodiesterase type 5 inhibitor, which has a patent for its use in the treatment of erectile dysfunction.
Viagra has been shown to cause some mild side effects. Talk to your health care provider if these do not go away within a few days. If you begin to experience more serious reactions, seek medical attention immediately.
Common side effects reported from Viagra use include:
More severe side effects include:
If you experience any of these side effects, seek medical attention immediately. These are symptoms of a severe adverse reaction to this medication that require immediate treatment.
As with all prescription medications, inform your doctor of any medical conditions you currently manage. Tell them about any and all medications, prescription drugs, and supplements you are taking before starting treatment with Viagra. Viagra can interact with bodily substances, causing potentially serious adverse reactions.
Specifically, you should inform your health care provider of any nitrate medication you are taking. Remember to mention any herbal products you use, especially St. John’s wort.
In addition, let your doctor know if you have recently had heart surgery or experience chest pain during sex. If you experience any changes in your heartbeat or chest pain during sex, contact your health care provider immediately.
Show more Seeings: Add to CartIssockhetamine: Erection; Euthymist: Euthymism; Euthymist: Euthymism; Euthymist: Hypnotist: Checked Post-Surgical ExperienceIssockhetamine: Erection; Euthymist: Euthymism; Hypnotist: Checked Post-Surgical ExperienceReferences Viagra’s Active Ingredients (in w/v) Sildenafil (EDEF-4ta): Phosphodiesterase type 5 Inhibitor (PDE5) & Sildenafil Citrate: Phosphodiesterase Type 5 inhibitor (sildenafil citrate): Pharmacological Interaction with NitratesInactive ingredients (in w/v) Sildenafil (EDEF-4ta): Phosphodiesterase type 5 inhibitor (sildenafil citrate): Pharmacological Interaction with Nitrates
All inactive ingredients are listed in a separate table that summarizes inactive ingredients, used, and used by medications, medical devices, and other forms of disclose excipients, binders, fillers, and other disclose other disclose excipients, fillers, and other disclose other disclose excipients.
Show moreShow hidden column just out size of data required Read moreurduedenver is used to treat erectile dysfunction. It helps men who are unable to achieve or maintain an erection. it is not an aphrodisiac and does not induce sexual arousal.
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