tadalafil(Cialis, Adcirca, Alyq)
Phosphodiesterase-5 (PDE5) inhibitor
Pronunciation
/təˈdælɪfɪl/
International Phonetic Alphabet (IPA). Say it aloud once — you will remember it forever.
At a glance
- Generic name
- tadalafil
- Brand names
- Cialis, Adcirca, Alyq
- Therapeutic class
- Phosphodiesterase-5 (PDE5) inhibitor
- Mechanism (summary)
- <!-- AI-DRAFTED: 2026-06-24 -->
Clinical pearls
- Can be taken with or without food.
- Effective for up to 36 hours (vs ~4 h for sildenafil) - "weekend pill."
- Do NOT use with nitrates (any form, any time) - life-threatening hypotension.
- Seek emergency care if erection lasts >4 hours.
- Report sudden vision or hearing loss.
Related drugs in this class
Sources
See how tadalafil appears in NAPLEX-style questions
PharmDHub Premium includes a full drug card, dosing, boxed warnings, drug-drug interactions, and practice questions built around this drug.