Can Cialis Cause Anxiety?
Cialis (tadalafil) is not known to cause anxiety as a direct pharmacological effect, and the FDA-approved drug label does not list anxiety as a recognized adverse reaction. 1
What the FDA Label Says
The official FDA labeling for Cialis lists the most frequently reported adverse events as dyspepsia, headache, flushing, back pain, nasal congestion, myalgia, visual disturbance, and dizziness—but anxiety is notably absent from this list 2, 1. The drug's mechanism as a phosphodiesterase-5 inhibitor causes vasodilation, which explains the cardiovascular and vasodilatory side effects, but does not directly affect neurotransmitter systems typically associated with anxiety.
The Paradox: Evidence Suggests the Opposite
Interestingly, the research evidence actually points in the opposite direction:
Chronic tadalafil use may have anxiolytic (anti-anxiety) effects. A 2012 study in animal models demonstrated that chronic treatment with tadalafil displayed anxiolytic effects, reversing anxiety-like behavior 3.
Tadalafil may reduce psychological distress. A 2009 clinical study showed that tadalafil treatment significantly improved obsessive-compulsive symptoms, depression, anxiety, and psychoticism in men with erectile dysfunction and vascular risk factors 4.
Recent 2024 research confirmed antidepressant and anxiolytic-like effects of tadalafil, showing it modulates neuroinflammation and gut-brain axis mechanisms that contribute to anxiety and depression 5.
A 2025 randomized controlled trial found that daily tadalafil significantly reduced depression and anxiety symptoms at 12 weeks in patients with erectile dysfunction 6.
The One Exception: A Single Case Report
There is one isolated case report from 2025 describing a patient who developed dizziness, palpitations, headache, and anxiety specifically after ejaculation when using tadalafil 2.5 mg, with complete resolution after discontinuation 7. This represents an extremely rare, idiosyncratic reaction rather than a typical drug effect.
Clinical Bottom Line
If a patient reports anxiety while taking Cialis, consider these possibilities:
- Performance anxiety related to sexual activity itself (not the medication)—this is far more common than drug-induced anxiety
- Cardiovascular symptoms misinterpreted as anxiety—tadalafil causes vasodilation that may produce palpitations, dizziness, or flushing that patients might describe as "anxiety"
- Coincidental timing—anxiety from other life stressors occurring during the treatment period
- Extremely rare idiosyncratic reaction—as documented in the single case report 7
The evidence strongly suggests that tadalafil does not cause anxiety and may actually improve anxiety symptoms in some patients. If anxiety symptoms are genuinely concerning and temporally related to tadalafil use, discontinuation is reasonable, but clinicians should thoroughly explore alternative explanations first.