I am glad to hear the medication has been effective. The active ingredient in your treatment is sildenafil. Yes, taking it regularly once a week is generally safe. Sildenafil is designed to be taken on an as-needed basis, and can even be used up to once daily depending on your doctor's advice. However, please ensure you never take it if you are using nitrate medications for heart conditions, as this combination can be unsafe. It is always best to let your doctor know about your routine to ensure it aligns with your overall cardiovascular health. Otherwise, weekly use is a very common and safe approach.