Safety · 4 min read
Understanding ED Medication Side Effects
Common, uncommon, and when to seek help.
- Written by
- SynMale Editorial
- Originally Published
- October 2026
- Last Updated
- October 2026
- Medical Review
- Not yet independently reviewed
Common effects—headache, flushing, nasal congestion, indigestion—follow from blood-vessel widening elsewhere in the body. Tadalafil more often causes back and muscle aches.
Seek urgent care for chest pain, sudden vision or hearing loss, or an erection lasting more than four hours.