Starting Treatment with Sildenafil 100mg Hexal
In the prior open-label study phase II study on pirfenidone for SSc, MMF was combined with pirfenidone in 63.5% of patients with good tolerability [24]. The monoclonal antibody against the interleukin (IL)-6 receptor, tocilizumab, may play a role in the treatment of ILD in SSc, particularly in patients with early dcSSc with inflammatory features. Two RCTs have investigated the safety and efficacy of tocilizumab in patients with early dSSc with elevated acute phase reactant proteins, and while the primary outcome for these studies was mRSS, the FVC was a key secondary endpoint [18,42]. In the phase II faSScinate trial, fewer patients in the tocilizumab arm experienced a decline in FVC at 48 weeks than in the placebo group (p = 0.0373) [42]. Furthermore, the FVC treatment effect appeared to be sustained in the open-label extension period [18]. The phase III trial of tocilizumab for SSc did not meet the primary endpoint of mRSS [43]. As with cutaneous sclerosis treatment, rituximab is frequently used to treat SSc patients with progressive ILD resistant to CYC and MMF. Evidence for using rituximab in SSc-ILD is largely based on observational studies [27–30] and one small RCT of short duration, which demonstrated an improvement in lung function over 6 months in patients randomized to rituximab versus CYC [26].
Frequently Asked Questions
The complications of RP are particularly severe in SSc, as the vasospasm compounds the already reduced blood flow in sildenafil citrate tablets 150 mg vessels affected by SSc vasculopathy [46]. Up to about 50% of patients with SSc are affected by RP may experience ischemic complications such as digital ulcers, pits, or gangrene [47]. This subset of patients requires more aggressive therapy with medication to prevent the loss of digital tissue. Recent studies have focused on determining whether specific drugs are more effective in preventing or healing digital ulcers, as some medications are known to be more effective for one than the other. The current standard of care for the management of patients experiencing RP-related digital ischemia involves minimizing environmental triggers and initiating medications that maximize peripheral blood flow (e.g.
Cite this chapter
On-demand therapy with phosphodiesterase inhibitors (i.e. sildenafil) for the treatment of primary or secondary RP was recently shown not to have clinically relevant efficacy, given the significant heterogeneity in patient responses [48]. Few studies have focused on the prevention of RP-associated ulcers. In the past decade, these areas of study have become areas of increasing interest (Table 4). The specific roles of phosphodiesterase inhibitors in healing RP-associated digital ulcers in SSc continues to be an active area of investigation, as this class of medications improves digital blood flow, and has been shown to have significant efficacy in secondary Raynaud’s [49,50].
Expert opinion:
The SEDUCE study group recently evaluated the effects of sildenafil on ischemic digital ulcer healing in SSc in a randomized placebo-controlled trial [51]. Eighty-three patients with a total of 192 digital ulcers were included in the intention-to-treat analysis (89 in the sildenafil group, 103 in the placebo group), however the primary endpoint was not reached. In order to expand therapeutic options for the treatment of SSc-related RP attacks, tadalafil was studied in a prospective double-blind placebo-controlled crossover study. Patients were randomized to receive a fixed dose of tadalafil at 20 mg daily or placebo for a 4 week period, and the RP condition score, frequency of RP episodes, and duration of RP episodes between treatment groups was compared. While tadalafil was well-tolerated, there was no significant difference in treatment response between the tadalafil arm and the placebo arm [52]. In addition, a nested case-control analysis of the EUSTAR cohort found that the SSc-ILD patients (N = 9) treated with rituximab experienced stability in the FVC; whereas the matched-control patients experienced a significant decline in FVC over a median of 6 months [29]. To date, only one small RCT has been published on rituximab for SSc-ILD, and this study found that treatment with rituximab was associated with a significant improvement in lung function compared with placebo [44]. In this study, the majority of the rituximab-treated patients also experienced a reduction in ground glass opacities (but not reticulations) on HRCT at 18 months (based on visual assessment) [44]. A larger double-blind, RCT comparing IV CYC (600 mg/m2 body surface area monthly for 6 months) versus rituximab (1 g at baseline and at 2 weeks) for connective tissue disease-related ILD, including SSc-ILD, is currently underway in the UK (NCT01862926).
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The primary outcome for this study is the change in FVC at 48 weeks [45] (Table 3). Approximately 90–95% of patients with SSc have Raynaud phenomenon (RP), and it is often the presenting feature of SSc.
2. Novel strategies for treating complications of SSC
It is characterized by peripheral vasospasm that leads to a transient discoloration (erythema, cyanosis, and/or pallor) and/or numbness in the digits immediately following specific triggers, such as exposure to cold temperatures, relative changes in the temperature of the surrounding environment, and/or exposure to stress. The complications of RP are particularly severe in SSc, as the vasospasm compounds the already reduced blood flow in sildenafil citrate tablets 150 mg vessels affected by SSc vasculopathy [46]. Up to about 50% of patients with SSc are affected by RP may experience ischemic complications such as digital ulcers, pits, or gangrene [47]. This subset of patients requires more aggressive therapy with medication to prevent the loss of digital tissue. Recent studies have focused on determining whether specific drugs are more effective in preventing or healing digital ulcers, as some medications are known to be more effective for one than the other. The current standard of care for the management of patients experiencing RP-related digital ischemia involves minimizing environmental triggers and initiating medications that maximize peripheral blood flow (e.g. On-demand therapy with phosphodiesterase inhibitors (i.e. sildenafil) for the treatment of primary or secondary RP was recently shown not to have clinically relevant efficacy, given the significant heterogeneity in patient responses [48]. Few studies have focused on the prevention of RP-associated ulcers. In the past decade, these areas of study have become areas of increasing interest (Table 4). The specific roles of phosphodiesterase inhibitors in healing RP-associated digital ulcers in SSc continues to be an active area of investigation, as this class of medications improves digital blood flow, and has been shown to have significant efficacy in secondary Raynaud’s [49,50].
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However, a subsequent study examined the benefits of tadalafil as an add-on therapy for the healing and prevention of digital ulcers. This double-blind, randomized, cross-over trial evaluated women sildenafil the efficacy of tadalafil as add-on therapy in patients with treatment-resistant RP. Patients with SSc and MCTD who were on vasodilators, but still having 4 or more episodes of RP attacks per week were included and randomized to receive either tadalafil 20 mg per day or placebo. Significant improvements from baseline were observed in several outcome measures during tadalafil therapy compared to placebo, including mean daily frequency of RP episodes, mean daily duration of RP, and mean daily RP condition score. In the tadalafil group, all 24 digital lesions healed compared to only 3 of 13 in the placebo group, and only one new ulcer was reported during tadalafil therapy compared to 13 in patients on placebo therapy [53].
2.1. Cutaneous sclerosis
Collectively, these data suggest that phosphodiesterase-inhibitors play an important role in the healing and prevention of digital ulcers in SSc-related RP. Prostacyclins and prostaglandins continue to serve as key therapies used to treat challenging cases of RP in the context of SSc. Iloprost, for example, serves as a standard treatment of existing digital ulcers [54–56]. It is currently indicated for patients with severe disabling Raynaud’s unresponsive to other therapies for the prevention of ischemic pain, peripheral ulcers, and necrosis of the digits to prevent amputation. It may be administered by one of three schedules: (a) 3-day schedule as an inpatient for RP/SSc; (b) 5-day schedule as an outpatient for RP/SSc; or (c) continuous infusion for the treatment of patient with active or extensive digital ulcers, severe digital ischemia, or for patients who cannot tolerate higher rates of the infusion.
Authors and Affiliations
Details of the complex infusion protocols can be found here [57]. Treprostanil, a synthetic analog of prostacyclin (PGI2), has also been studied as a therapy for patients with SSc-associated Raynaud’s and/or digital ulcers, in both oral and topical formulations. Oral treprostanil initially showed promise in patients with blue sildenafil SSc and digital ischemia in a phase 1 study, where effective absorption and temporal associations with improved cutaneous perfusion and temperature were noted [58]. The recurrence of digital ulcers in patients with SSc after discontinuation of oral treprostanil was also noted in a multicentered retrospective study, also suggesting some benefit [59]. However, the association between vascular biomarkers and digital ulcerations in SSc was recently evaluated using the DISTOL-1 randomized controlled trial cohort, and a lack of strong response to any vascular, angiogenic, or inflammatory markers suggested that these patways are not primary drivers in the development of digital ulcer clinical outcomes in an SSc population [60]. The SEDUCE study group recently evaluated the effects of sildenafil on ischemic digital ulcer healing in SSc in a randomized placebo-controlled trial [51].
Mode of Action TOURNES 100mg
In the prior open-label study phase II study on pirfenidone for SSc, MMF was combined with pirfenidone in 63.5% of patients with good tolerability [24]. The monoclonal antibody against the interleukin (IL)-6 receptor, tocilizumab, may play a role in the treatment of ILD in SSc, particularly in patients with early dcSSc with inflammatory features. Two RCTs have investigated the safety and efficacy of tocilizumab in patients with early dSSc with elevated acute phase reactant proteins, and while the primary outcome for these studies was mRSS, the FVC was a key secondary endpoint [18,42]. In the phase II faSScinate trial, fewer patients in the tocilizumab arm experienced a decline in FVC at 48 weeks than in the placebo group (p = 0.0373) [42]. Furthermore, the FVC treatment effect appeared to be sustained in the open-label extension period [18].
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The phase III trial of tocilizumab for SSc did not meet the primary endpoint of mRSS [43]. As with cutaneous sclerosis treatment, rituximab is frequently used to treat SSc patients with progressive ILD resistant to CYC and MMF. Evidence for using rituximab in SSc-ILD is largely based on observational studies [27–30] and one small RCT of short duration, which demonstrated an improvement in lung function over 6 months in patients randomized to rituximab versus CYC [26]. In addition, a nested case-control analysis of the EUSTAR cohort found that the SSc-ILD patients (N = 9) treated with rituximab experienced stability in the FVC; whereas the matched-control patients experienced a significant decline in FVC over a median of 6 months [29]. To date, only one small RCT has been published on rituximab for SSc-ILD, and this study found that treatment with rituximab was associated with a significant improvement in lung function compared with placebo [44].
Off-Label und potentielle Anwendungsgebiete
In this study, the majority of the rituximab-treated patients also experienced a reduction in ground glass opacities (but not reticulations) on HRCT at 18 months (based on visual assessment) [44]. A larger double-blind, RCT comparing IV CYC (600 mg/m2 body surface area monthly for 6 months) versus rituximab (1 g at baseline and at 2 weeks) for connective tissue disease-related ILD, including SSc-ILD, is currently underway in the UK (NCT01862926). The primary outcome for this study is the change in FVC at 48 weeks [45] (Table 3). Approximately 90–95% of patients with SSc have Raynaud phenomenon (RP), and it is often the presenting feature of SSc. It is characterized by peripheral vasospasm that leads to a transient discoloration (erythema, cyanosis, and/or pallor) and/or numbness in the digits immediately following specific triggers, such as exposure to cold temperatures, relative changes in the temperature of the surrounding environment, and/or exposure to stress. Eighty-three patients with a total of 192 digital ulcers were included in the intention-to-treat analysis (89 in the sildenafil group, 103 in the placebo group), however the primary endpoint was not reached.
- Sildenafil 100mg Hexal may cause interactions with blood pressure medicines.
- Do not take if you have severe liver or kidney disease.
- Report any chest pain or prolonged erection immediately.
- The medication can cause flushing or nasal congestion.
- Follow your healthcare provider’s instructions precisely.
In order to expand therapeutic options for the treatment of SSc-related RP attacks, tadalafil was studied in a prospective double-blind placebo-controlled crossover study. Patients were randomized to receive a fixed dose of tadalafil at 20 mg daily or placebo for a 4 week period, and the RP condition score, frequency of RP episodes, and duration of RP episodes between treatment groups was compared. While tadalafil was well-tolerated, there was no significant difference in treatment response between the tadalafil arm and the placebo arm [52]. However, a subsequent study examined the benefits of tadalafil as an add-on therapy for the healing and prevention of digital ulcers. This double-blind, randomized, cross-over trial evaluated women sildenafil the efficacy of tadalafil as add-on therapy in patients with treatment-resistant RP. Patients with SSc and MCTD who were on vasodilators, but still having 4 or more episodes of RP attacks per week were included and randomized to receive either tadalafil 20 mg per day or placebo. Significant improvements from baseline were observed in several outcome measures during tadalafil therapy compared to placebo, including mean daily frequency of RP episodes, mean daily duration of RP, and mean daily RP condition score. In the tadalafil group, all 24 digital lesions healed compared to only 3 of 13 in the placebo group, and only one new ulcer was reported during tadalafil therapy compared to 13 in patients on placebo therapy [53]. Collectively, these data suggest that phosphodiesterase-inhibitors play an important role in the healing and prevention of digital ulcers in SSc-related RP. Prostacyclins and prostaglandins continue to serve as key therapies used to treat challenging cases of RP in the context of SSc. Iloprost, for example, serves as a standard treatment of existing digital ulcers [54–56]. It is currently indicated for patients with severe disabling Raynaud’s unresponsive to other therapies for the prevention of ischemic pain, peripheral ulcers, and necrosis of the digits to prevent amputation. It may be administered by one of three schedules: (a) 3-day schedule as an inpatient for RP/SSc; (b) 5-day schedule as an outpatient for RP/SSc; or (c) continuous infusion for the treatment of patient with active or extensive digital ulcers, severe digital ischemia, or for patients who cannot tolerate higher rates of the infusion.
Article highlights.
Details of the complex infusion protocols can be found here [57].
| Property | Description | Value | Notes |
|---|---|---|---|
| Active ingredient | Sildenafil citrate | - | Main component |
| Mechanism of action | PDE5 inhibitor | - | Enhances blood flow |
| Half-life | Approximately 4 hours | 3-5 hours | Duration of effect |
| Absorption | Rapid, peaks in 30-120 minutes | - | After oral intake |
Treprostanil, a synthetic analog of prostacyclin (PGI2), has also been studied as a therapy for patients with SSc-associated Raynaud’s and/or digital ulcers, in both oral and topical formulations.
- It is important to report any serious side effects.
- Consuming high-fat meals can delay drug action.
- Sildenafil doesn't protect against sexually transmitted infections.
- It’s vital to use as directed for safe results.
- Never use more than one dose in 24 hours.
Oral treprostanil initially showed promise in patients with blue sildenafil SSc and digital ischemia in a phase 1 study, where effective absorption and temporal associations with improved cutaneous perfusion and temperature were noted [58].
| Storage Condition | Details | Duration | Additional Notes |
|---|---|---|---|
| Temperature | Store below 25°C (77°F) | Up to 2 years | Keep in original container |
| Light exposure | Keep away from direct sunlight | - | Store in a cool, dry place |
| Humidity | Keep dry, avoid bathroom storage | - | Prevent moisture degradation |
The recurrence of digital ulcers in patients with SSc after discontinuation of oral treprostanil was also noted in a multicentered retrospective study, also suggesting some benefit [59]. However, the association between vascular biomarkers and digital ulcerations in SSc was recently evaluated using the DISTOL-1 randomized controlled trial cohort, and a lack of strong response to any vascular, angiogenic, or inflammatory markers suggested that these patways are not primary drivers in the development of digital ulcer clinical outcomes in an SSc population [60]. The effects of topical treprostanil have also been a focus of recent work. Treprostanil iontophoresis in patients with SSc was also studied to determine its ability to improve digital blood flow during local (hand) cooling [61]. It showed promised as digital treprostanil iontophoresis shifted skin blood flow upward during local cooling on the hand and during the initial rewarming phase in patients with SSc. The safety profile of treprostinil hydrogel iontophoresis was also recently examined in a 2-stage randomized, placebo-controlled single ascending-dose study among healthy volunteers and patients with SSc-related digital ulcers and was found to be fairly well-tolerated, with 2 minimal local adverse effects reported among 5 SSc patients with digital ulcers [62]. A phase 2 multi-center, double-blind, RCT is currently examining the effects of intravenous iloprost on RP in patients with SSc. Forty-one patients were enrolled and randomized to receive either intravenous iloprost or placebo infusion, and the primary endpoint is the change in weekly frequency of symptomatic RP attacks at 21 days.
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The effects of topical treprostanil have also been a focus of recent work. Treprostanil iontophoresis in patients with SSc was also studied to determine its ability to improve digital blood flow during local (hand) cooling [61]. It showed promised as digital treprostanil iontophoresis shifted skin blood flow upward during local cooling on the hand and during the initial rewarming phase in patients with SSc. The safety profile of treprostinil hydrogel iontophoresis was also recently examined in a 2-stage randomized, placebo-controlled single ascending-dose study among healthy volunteers and patients with SSc-related digital ulcers and was found to be fairly well-tolerated, with 2 minimal local adverse effects reported among 5 SSc patients with digital ulcers [62]. A phase 2 multi-center, double-blind, RCT is currently examining the effects of intravenous iloprost on RP in patients with SSc.
2.4. Pulmonary hypertension
Forty-one patients were enrolled and randomized to receive either intravenous iloprost or placebo infusion, and the primary endpoint is the change in weekly frequency of symptomatic RP attacks at 21 days. Results of this study are pending (NCT03867097), and the phase 3 trial is enrolling (NCT04040322). Endothelin-1 is a well-recognized promoter of vasculopathy in SSc. Prior studies have demonstrated that bosentan, a dual endothelin receptor antagonist, successfully prevents RP-related digital ulcers in SSc. In an earlier clinical trial, RAPIDS-1, which enrolled SSc patients with or without digital ulcers at baseline, bosentan significantly reduced the number of new digital ulcers compared to placebo.
1.1. Determining when therapy is indicated
The purpose of subsequent RAPIDS-2 trial is to evaluate the effects of bosentan compared to placebo on ulcer prevention and healing over a 24-week treatment period. Patients received bosentan 62.5 mg twice daily for 4 weeks and then 125 mg twice daily for 20 weeks or the equivalent placebo, and time to complete healing of the cardinal ulcer and the total number of new digital ulcers per patient over 24 weeks was assessed [63]. Results of this study are pending (NCT03867097), and the phase 3 trial is enrolling (NCT04040322). Endothelin-1 is a well-recognized promoter of vasculopathy in SSc. Prior studies have demonstrated that bosentan, a dual endothelin receptor antagonist, successfully prevents RP-related digital ulcers in SSc. In an earlier clinical trial, RAPIDS-1, which enrolled SSc patients with or without digital ulcers at baseline, bosentan significantly reduced the number of new digital ulcers compared to placebo. The purpose of subsequent RAPIDS-2 trial is to evaluate the effects of bosentan compared to placebo on ulcer prevention and healing over a 24-week treatment period. Patients received bosentan 62.5 mg twice daily for 4 weeks and then 125 mg twice daily for 20 weeks or the equivalent placebo, and time to complete healing of the cardinal ulcer and the total number of new digital ulcers per patient over 24 weeks was assessed [63].