Fildena 120 mg can sometimes cause fatigue as a side effect because of how sildenafil affects blood flow and blood pressure in the body.
Sildenafil works by relaxing blood vessels to improve circulation to the penis during sexual stimulation. However, this vasodilation effect is not limited to the genital area—it can also slightly lower systemic blood pressure. When blood pressure drops, some men may feel tired, weak, or lightheaded, especially after sexual activity.
Another reason is the body’s energy expenditure during sexual activity combined with the medication’s cardiovascular effects. Increased heart rate, muscle activity, and emotional arousal can contribute to temporary post-activity fatigue.
The high dose Fildena 120 mg can also increase the likelihood of side effects compared to standard doses like 50 mg or 100 mg. Higher levels of sildenafil in the bloodstream may intensify effects such as headache, flushing, dizziness, and overall tiredness.
Fatigue may also be more noticeable in men who are dehydrated, consuming alcohol, or already experiencing stress, poor sleep, or underlying health conditions such as heart disease or diabetes.
Compared to lower-dose sildenafil products like Viagra, higher-strength formulations like Fildena 120 mg are more likely to produce stronger systemic effects.
In summary, fatigue from Fildena 120 mg is usually due to lowered blood pressure, higher drug strength, and physical exertion, and it is typically temporary but more common at higher doses.
