Fildena 25 mg contains sildenafil 25 mg, and 25 mg is an established lower dose of sildenafil for erectile dysfunction. Fildena 25 mg is marketed for ED, although the exact brand availability varies by pharmacy. T Trione Pharma +1 It may be used when a lower sildenafil dose is appropriate, such as in some people who are sensitive to side effects or need a lower starting dose. Sildenafil works only with ***** stimulation and generally should not be taken more than once in 24 hours. 1 1mg For context, sildenafil is also available in 25, 50, and 100 mg strengths; 50 mg is a commonly used starting dose for many adults, while 25 mg may be selected based on individual factors. M MIMS Important: Don't use sildenafil with nitrate medicines (such as nitroglycerin), and don't combine it with other ED medicines unless your doctor specifically advises you to.