Specific objectives related to the investigation of: a) whether a prescribing trend of ED drugs is associated with deprivation and demography of various English geographical regions; and b) whether the legal reclassification of sildenafil to ‘pharmacy-only’ medicine has impacted on the trend in quantity and cost of prescribing of ED drugs in England. A secondary analysis of routinely collected data on the prescribing and dispensing of two ED drugs, sildenafil and tadalafil, within the NHS England primary care settings between January 2009 and November 2019, was conducted. This time period includes switches from patented medicines to generic drugs for both tadalafil and sildenafil, as well as the reclassification of sildenafil to ‘pharmacy-only’ medicine in March 2018. Prescribing datasets were extracted from NHS Digital sources including OpenPrescribing.net and Prescription Cost Analysis (PCA).11 These included data on the number of items prescribed, cost of prescribing, and prescribing patterns within specific clinical commissioning groups (CCGs) for both drugs. Data were adjusted for inflation using the Bank of England inflation calculator based on Office for National Statistics (ONS) composite price index.12 Data were also adjusted for male population estimates for each year.13 All data were extracted, independently checked for accuracy, and analysed using Microsoft Excel and IBM SPSS Statistics (version 21).

Cialis works by inhibiting PDE5 enzyme, enhancing blood flow.
The drug's effects can last up to 36 hours, providing flexibility.
Sexual stimulation is necessary for Cialis to work effectively.
It is generally taken before anticipated sexual activity.
Do not take multiple doses at once to avoid overdose.
The recommended starting dose varies by individual health.
Generic Cialis may be prescribed for daily use or on-demand.
Consuming high-fat meals can delay Cialis absorption.
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Myth	Truth	Explanation
It’s only for young men	Suitable for many age groups	Most effective when used as prescribed
It causes permanent erections	No, it improves blood flow temporarily	Effects last about 36 hours, not permanent
It’s addictive	No, it’s not addictive	Can be used safely as needed
Only available by prescription in UK	Widely available with prescription, some online sources also offer it	Prescription needed for legal purchase

The CCGs are clinically-led autonomous NHS bodies involved in planning and commissioning healthcare services for their locality. The 10 most deprived and the 10 least deprived CCGs covered a population of 1.38 million and 1.30 million, respectively.

Manufacturer Information

A 5.8% yearly increase in the rate of prescription was observed between 2017 and 2018. A 0.5% increase in the rate of prescribing between 2018 and 2019 was observed, suggesting modest impact of reclassification on the prescribing practices. The number of items prescribed per 1000 men were 124.2 and 125.8 in 2018 and 2019, respectively. The spending on primary care prescriptions for ED decreased by 71.0% from £77.4 million in 2009 to £22.4 million in 2019. The spending on sildenafil decreased by 90% and tadalafil decreased by 75%.

Prescription Trends and Adoption

The biggest decreases were seen after 2014 for cialis 5 price sildenafil and 2018 for tadalafil (Figure 1). The most deprived regions consistently showed higher rates of prescriptions for ED drugs. In 2019 there were 190.4 items prescribed per 1000 men of all ED drugs in the most deprived region. This figure was approximately 21.0% higher compared with the data from the least deprived regions, where a total of 150.5 items were prescribed per 1000 men. In the most deprived regions, the yearly increases in prescription items were 9.0% in 2016, 4.5% in 2017, and 4.4% and 5.0% in 2018 and 2019, respectively.

Comparison with existing literature

An overall 24.9% increase in prescription items buy cialis with priligy online was observed from 2015–2019. In the least deprived region, the rate of increase in the number of prescriptions was 38.9% during the same period (Figure 2). A wide variation in the rate of prescribing across the six English regions were observed. The North East and the North West regions had approximately 50% higher rates of prescribing compared with London. Rates of prescribing were 15.9, 15.3, and 10.3 items per 1000 men each month, respectively, in these regions (Figure 3). Number of items prescribed for ED increased by 110% between 2009 and 2019 (Figure 1). The increase in the number of items prescribed was mostly accounted for by sildenafil prescriptions, which increased by 165%.

Product	Dosage	Quantity + Bonus	Price
Cialis Generic	60mg	20 Pills	65.61€ 62.49€
Cialis Professional	20mg	10 Pills	48.29€ 45.99€
Cialis Generic	40mg	60 + 6 Pills	130.98€ 124.74€
Cialis Generic	20mg	90 + 6 Pills	154.71€ 147.34€
Cialis Professional	40mg	20 Pills	110.24€ 104.99€
Cialis Soft Tabs	20mg	20 + 2 Pills	66.98€ 63.79€
Cialis Black	80mg	270 + 10 Pills	502.88€ 478.93€
Cialis Generic	40mg	360 + 10 Pills	477.87€ 455.11€
Cialis Generic	60mg	120 + 8 Pills	240.18€ 228.74€
Cialis Generic	60mg	270 + 10 Pills	443.96€ 422.82€
Cialis Original	20mg	12 Pills	78.32€ 74.59€
Cialis Professional	20mg	180 + 4 Pills	423.11€ 402.96€
Cialis Generic	10mg	270 + 10 Pills	308.71€ 294.01€
Cialis Super Active	20mg	10 Pills	55.64€ 52.99€
Cialis Generic	60mg	180 + 10 Pills	313.11€ 298.20€
Cialis Generic	40mg	90 + 6 Pills	171.35€ 163.19€

There were 2 145 393 items for ED prescribed in 2009 and 4 505 623 in 2019.

Cialis should be stored at room temperature, away from moisture.
Keep medications out of reach of children.
Expiry dates should be checked before use.
Do not use Cialis if it has changed color or appearance.
Proper disposal is necessary for unused medications.
Store in a secure container to prevent theft.
Consult your pharmacist for proper storage advice.
Do not share Cialis with others.
Maintaining proper storage ensures medication potency.

The biggest year-on-year increase in the number of prescriptions was seen in 2014–2015, where an increase of 24% was observed. The total items prescribed for sildenafil was relatively steady from 2009–2013, at around 48 items prescribed a year per 1000 men. The prescribing increased rapidly from 2013–2017. The highest yearly increase occurred from 2014–2015, which showed a 42.1% increase. A 5.8% yearly increase in the rate of prescription was observed between 2017 and 2018. A 0.5% increase in the rate of prescribing between 2018 and 2019 was observed, suggesting modest impact of reclassification on the prescribing practices. The number of items prescribed per 1000 men were 124.2 and 125.8 in 2018 and 2019, respectively. The spending on primary care prescriptions for ED decreased by 71.0% from £77.4 million in 2009 to £22.4 million in 2019.

Safety measures

Comparison with actions of other PDE5 inhibitors

Prescription patterns in the 10 most and the 10 least deprived CCGs as per the ONS Index of Multiple Deprivation (IMD) in 2015 (Table 2) were also extracted and analysed to explore the link between prescribing pattern and deprivation. The CCGs are clinically-led autonomous NHS bodies involved in planning and commissioning healthcare services for their locality. The 10 most deprived and the 10 least deprived CCGs covered a population of 1.38 million and 1.30 million, respectively. Number of items prescribed for ED increased by 110% between 2009 and 2019 (Figure 1). The increase in the number of items prescribed was mostly accounted for by sildenafil prescriptions, which increased by 165%.

Molecular Weight

There were 2 145 393 items for ED prescribed in 2009 and 4 505 623 in 2019. The biggest year-on-year increase in the number of prescriptions was seen in 2014–2015, where an increase of 24% was observed. The total items prescribed for sildenafil was relatively steady from 2009–2013, at around 48 items prescribed a year per 1000 men. The prescribing increased rapidly from 2013–2017. The highest yearly increase occurred from 2014–2015, which showed a 42.1% increase. The spending on sildenafil decreased by 90% and tadalafil decreased by 75%. The biggest decreases were seen after 2014 for cialis 5 price sildenafil and 2018 for tadalafil (Figure 1).

Cialis and Viagra drug interactions and warnings

Only two PDE-5Is were included, sildenafil and tadalafil, as the authors' observations suggested that the rest of the PED-5Is accounted for negligible volume of prescribing and, hence, did not impact on the once a day cialis trend analysis. Similarly, community and online pharmacy sales of over-the-counter sildenafil were not included in the trend analysis. Some patients may avoid perceived embarrassment and confidentiality issues in face-to-face clinical consultations in primary care and community pharmacy16 by accessing medicines through online sources. Other available treatments for ED, including vacuum-pump treatment and psychosexual therapies, were not included in the study. In addition, prevalence data of ED over time were considered for this study.

How Medication Helps

The segmented regression for different policy changes (for example, sildenafil patent expiry in June 2013, tadalafil patent expiry in November 2017, and reclassification of sildenafil from prescription medicine to pharmacy medicine in March 2018) could not be performed owing to: a) absence of monthly prescribing and spending data (access was restricted to annual level for historical data prior to 2015); and b) inadequate time-points before and after different policy changes needed to conduct segmented regression analysis.17 There is a lack of literature on the prescribing and management of ED in primary care. Previous studies have reported that many men do not seek help with sexual problems to avoid perceived embarrassment for themselves and their doctors.18,19 The observed increasing trend in the rate of prescriptions may have been contributed by various factors. These include inclusion of ED assessment for men with diabetes in the Quality and Outcomes Framework (QOF) since 2013–2014.20 The QOF required opportunistic screening, advice and assessment of contributory factors, and treatment options for ED in patients with diabetes in primary care. In addition, media, including social media, may have contributed to increased knowledge and awareness of the condition among members of the general public given the licensing of newer PDE-5Is in recent years. The study shows that the introduction of generic versions of both sildenafil in 2013 and tadalafil in 2017 reduced overall spending on drugs used for ED.

Real Success Rates

The expiry of the patent on sildenafil in June 2013 allowed the NHS to purchase generic sildenafil from other pharmaceutical companies for a competitive price, subsequently reducing the price per item from £31.31 in 2012 to £2.53 in 2014.11 This also allowed sildenafil to be removed from the Selected List Scheme, which restricted prescriptions of certain drugs in May 2014, allowing more men access to the medicine on the NHS, which potentially increased the number of items prescribed.21 The patent on tadalafil also expired in November 2017, leading to a 49% decrease in cost per item from £49.40 in 2017 to £25.12 in 2018. The data suggest that more men are seeking help or being assessed for ED in primary care. The increased presentations and, hence, prescribing for EDs allows further opportunities to screen for the associated risk factors for ED. The most deprived regions consistently showed higher rates of prescriptions for ED drugs. In 2019 there were 190.4 items prescribed per 1000 men of all ED drugs in the most deprived region. This figure was approximately 21.0% higher compared with the data from the least deprived regions, where a total of 150.5 items were prescribed per 1000 men.

Side Effect	Severity	Incidence Rate	Advice
Headache	Mild	10%	Take analgesics if persistent
Flushing	Mild	8%	Usually subsides in 1 hour
Nasal Congestion	Mild	5%	Use decongestants if needed
Dizziness	Mild	4%	Avoid driving until stable

In the most deprived regions, the yearly increases in prescription items were 9.0% in 2016, 4.5% in 2017, and 4.4% and 5.0% in 2018 and 2019, respectively.

Over 1.000+ 5 star reviews

An overall 24.9% increase in prescription items buy cialis with priligy online was observed from 2015–2019.

Chemical Composition and Pharmaceutical Equivalence

In the least deprived region, the rate of increase in the number of prescriptions was 38.9% during the same period (Figure 2). A wide variation in the rate of prescribing across the six English regions were observed. The North East and the North West regions had approximately 50% higher rates of prescribing compared with London. Rates of prescribing were 15.9, 15.3, and 10.3 items per 1000 men each month, respectively, in these regions (Figure 3). The aim of this study was to investigate the trend in prescribing of drugs for ED in primary care settings in England and to assess the impact of deprivation, regional demography, and legal reclassification of sildenafil on prescribing practices of ED drugs. There was a persistent increase in the rate of prescribing for treatment of ED in men between 2009 and 2019 in English primary care. Sildenafil remained the most frequently prescribed medication out of the two drugs of choice. A strong link between deprivation and prescribing trends were observed across all data points. These can be linked to higher prevalence of risk factors of ED, such as cardiovascular and mental health conditions, with deprivation.14 A north–south divide was observed in the rate of prescriptions, with higher prescribing rates observed in the northern regions of England compared with London and the southern regions. While some of the regional variations are explained by the differences in deprivation level, London’s younger population compared with the rest of the country15 could explain low ED prevalence and the observed low prescribing for ED. In addition, patient behaviours around use of online sources for access to sildenafil may be different across various geographical regions. Data showed that reclassification of sildenafil to a pharmacy medicine from ‘prescription-only' medicine had modest impact on the trend of prescribing.

Generic Cialis is the common name for tadalafil, used to treat erectile dysfunction.
It is produced by multiple pharmaceutical companies worldwide.
The drug works by increasing blood flow to the penis.
Generic Cialis costs significantly less than the brand-name version.
It typically comes in 2.5mg, 5mg, 10mg, and 20mg doses.
Cialis has a long-lasting effect, up to 36 hours.
It should be taken at least 30 minutes before sexual activity.
Possible side effects include headache, flushing, and muscle pain.
Consult a doctor before using Cialis, especially with other medications.

It could be assumed that the reclassification of sildenafil would lead to a decrease in the number of items prescribed as people would be able to get their medicine directly from the pharmacy instead of needing to go to the doctors and wait for an appointment.

Aspect	Satisfaction Level	Comments	Number of Respondents
Effectiveness	4.5/5	Works well for most users	1,200
Price Affordability	4/5	Reasonable compared to brand	950
Side Effects Tolerance	3.5/5	Mild side effects manageable	1,100
Convenience of Purchase	4.2/5	Easy access in pharmacies	1,050

It is important to note, however, that the pharmacy version of sildenafil costs approximately £20 for a pack of four tablets (as of April 2020) whereas the generic sildenafil prescriptions from a GP only costs £9 for the same number of tablets. The higher cost of the pharmacy version of the medicine compared with the prescription cost may dissuade patients from using pharmacy for accessing sildenafil.

Generic Tadalafil Cheaper from India

The aim of this study was to investigate the trend in prescribing of drugs for ED in primary care settings in England and to assess the impact of deprivation, regional demography, and legal reclassification of sildenafil on prescribing practices of ED drugs. There was a persistent increase in the rate of prescribing for treatment of ED in men between 2009 and 2019 in English primary care. Sildenafil remained the most frequently prescribed medication out of the two drugs of choice. A strong link between deprivation and prescribing trends were observed across all data points. These can be linked to higher prevalence of risk factors of ED, such as cardiovascular and mental health conditions, with deprivation.14 A north–south divide was observed in the rate of prescriptions, with higher prescribing rates observed in the northern regions of England compared with London and the southern regions.

Potential Growth Drivers

While some of the regional variations are explained by the differences in deprivation level, London’s younger population compared with the rest of the country15 could explain low ED prevalence and the observed low prescribing for ED. In addition, patient behaviours around use of online sources for access to sildenafil may be different across various geographical regions. Data showed that reclassification of sildenafil to a pharmacy medicine from ‘prescription-only' medicine had modest impact on the trend of prescribing. It could be assumed that the reclassification of sildenafil would lead to a decrease in the number of items prescribed as people would be able to get their medicine directly from the pharmacy instead of needing to go to the doctors and wait for an appointment. It is important to note, however, that the pharmacy version of sildenafil costs approximately £20 for a pack of four tablets (as of April 2020) whereas the generic sildenafil prescriptions from a GP only costs £9 for the same number of tablets.

Duration of action

The higher cost of the pharmacy version of the medicine compared with the prescription cost may dissuade patients from using pharmacy for accessing sildenafil. In addition, confidentiality and privacy have been cited as barriers to utilisation of sexual health services from pharmacy.16 The lack of long-term monitoring and follow-up in pharmacy settings may also discourage many patients from accessing the pharmacy version of sildenafil. This project included data from very large routinely collected datasets covering all primary care prescriptions in England. Deprivation data were based on CCG level and individual practice level variations were not accounted for. This study only included NHS prescription data and private prescriptions were not accounted for. In addition, confidentiality and privacy have been cited as barriers to utilisation of sexual health services from pharmacy.16 The lack of long-term monitoring and follow-up in pharmacy settings may also discourage many patients from accessing the pharmacy version of sildenafil. This project included data from very large routinely collected datasets covering all primary care prescriptions in England. Deprivation data were based on CCG level and individual practice level variations were not accounted for.

In Great Britain, Cialis is available via prescription from healthcare providers.
The UK pharmacy laws regulate the sale of generic Cialis.
Purchasing from licensed UK pharmacies ensures safety and efficacy.
The Medicines and Healthcare products Regulatory Agency (MHRA) approves Cialis.
Generic Cialis must meet strict quality standards in the UK.
Online pharmacies may stock generic Cialis, but verify legitimacy.
Buying from unverified sources can pose health risks.
Generic Cialis helps improve accessibility due to lower costs.
Doctors can advise on the appropriate Cialis dosage and use.

This study only included NHS prescription data and private prescriptions were not accounted for. Only two PDE-5Is were included, sildenafil and tadalafil, as the authors' observations suggested that the rest of the PED-5Is accounted for negligible volume of prescribing and, hence, did not impact on the once a day cialis trend analysis. Similarly, community and online pharmacy sales of over-the-counter sildenafil were not included in the trend analysis. Some patients may avoid perceived embarrassment and confidentiality issues in face-to-face clinical consultations in primary care and community pharmacy16 by accessing medicines through online sources. Other available treatments for ED, including vacuum-pump treatment and psychosexual therapies, were not included in the study. In addition, prevalence data of ED over time were considered for this study. The segmented regression for different policy changes (for example, sildenafil patent expiry in June 2013, tadalafil patent expiry in November 2017, and reclassification of sildenafil from prescription medicine to pharmacy medicine in March 2018) could not be performed owing to: a) absence of monthly prescribing and spending data (access was restricted to annual level for historical data prior to 2015); and b) inadequate time-points before and after different policy changes needed to conduct segmented regression analysis.17 There is a lack of literature on the prescribing and management of ED in primary care. Previous studies have reported that many men do not seek help with sexual problems to avoid perceived embarrassment for themselves and their doctors.18,19 The observed increasing trend in the rate of prescriptions may have been contributed by various factors. These include inclusion of ED assessment for men with diabetes in the Quality and Outcomes Framework (QOF) since 2013–2014.20 The QOF required opportunistic screening, advice and assessment of contributory factors, and treatment options for ED in patients with diabetes in primary care. In addition, media, including social media, may have contributed to increased knowledge and awareness of the condition among members of the general public given the licensing of newer PDE-5Is in recent years. The study shows that the introduction of generic versions of both sildenafil in 2013 and tadalafil in 2017 reduced overall spending on drugs used for ED. The expiry of the patent on sildenafil in June 2013 allowed the NHS to purchase generic sildenafil from other pharmaceutical companies for a competitive price, subsequently reducing the price per item from £31.31 in 2012 to £2.53 in 2014.11 This also allowed sildenafil to be removed from the Selected List Scheme, which restricted prescriptions of certain drugs in May 2014, allowing more men access to the medicine on the NHS, which potentially increased the number of items prescribed.21 The patent on tadalafil also expired in November 2017, leading to a 49% decrease in cost per item from £49.40 in 2017 to £25.12 in 2018. The data suggest that more men are seeking help or being assessed for ED in primary care.

Impersonation risk

The increased presentations and, hence, prescribing for EDs allows further opportunities to screen for the associated risk factors for ED.