Reported side effects in dogs: gastrointestinal upset and reddening or flushing of the skin. Side effects in humans include headache, nasal congestion, difficulty breathing, prolonged erection and dizziness.
Reported side effects in dogs: gastrointestinal upset and reddening or flushing of the skin. Side effects in humans include headache, nasal congestion, difficulty breathing, prolonged erection and dizziness.