Efficacy and safety of sildenafil in patients with systemic scleroderma


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AIM: To retrospectively analyze the efficacy and safety of sildenafil (Sf) in patients with systemic sclerosis (SS). Subjects an/RESULTS: Sf was used in 16 patients (including 14 women) aged 20-66 years (mean 48.6±14.6 years; median 51.5 years) with SS of a duration of 2 months to 27 years (mean 8.8±7.3 years; median 6.5 years). The indications for Sf treatment were significant Raynaud's phenomenon (RP) in 3 patients, digital ulcers (DU) and/or necroses (N) in 9, pulmonary hypertension (PH) in 5 (2 patients had PH concurrent with DU/N), and critical ischemia of the left fingers in 1 patient. RP was seen in all the patients and so the effect of Sf on the course of RP was evaluated in the whole patient group/RESULTS: There was a significant decrease in the frequency and intensity of Raynaud's attacks in 11 (73%) of the 15 patients treated with Sf. This effect was obvious just in the first days of Sf treatment and remained stable throughout the treatment. No RP changes were seen in 3 patients. All 7 patients with DUs showed a decrease in their sizes just within the first two weeks of treatment. Complete DU healing was observed within 4-12 weeks of treatment. During a month, the necrotic area reduced and the signs of reparation appeared in 4 of the 6 patients. Pain ceased just within the first 5-7 days of treatment. Sf resulted in a rapid reduction in systolic pulmonary artery pressure (sPAP); in one case the latter diminished from 60 to 40 mm Hg just 90 min after the first intake of Sf 50 mg and remained unchanged during all 6 months during which the female patient was taking the drug. Doppler echocardiography showed that sPAP decreased from 103 to 85 mm Hg in another female taking Sf 100 mg for a month. The two cases showed clinical improvement as alleviated dyspnea and increased physical activity. In another case, Sf was discontinued because of dizziness after its first intake in a dose of 12.5 mg. The initial drug intake of the drug was not followed by adverse reactions in 12 (75%) of the 16 patients. Four patients had Sf-induced complaints, including headache (1), dizziness (2), and more severe angina pectoris (1). In different periods after treatment initiation, four more patients developed complications, such as fatal myocardial infarction after 6-week treatment, atrial fibrillation at 8 weeks, more severe angina at 6 months, and congestive heart failure after 5-year treatment. These complications were observed in patients with severe ECG changes, such as myocardial focal fibrosis or blood supply impairment/CONCLUSION: Sf is an effective drug to treat the manifestations of scleroderma vasculopathy, such as RP, DU/N, and PH. Sf is well tolerated in most cases. The SS patients with pronounced ECG changes have an increased risk of severe cardiac events and they need careful ECG monitoring.

About the authors

R T Alekperov

НИИ ревматологии РАМН, Москва

Email: ralekperov@list.ru

L P Anan'eva

НИИ ревматологии РАМН, Москва

E G Korzeneva

НИИ ревматологии РАМН, Москва

E O Cheremukhina

НИИ ревматологии РАМН, Москва

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