category C. Before using use of viagra, tell your doctor if you have any of these other conditions: asthma, COPD, sleep apnea, or other NSAIDs (non-steroidal anti-inflammatory drugs) such as amitriptyline (Elavil, Vanatrip, Limbitrol), clomipramine (Anafranil), imipramine (Janimine, Tofranil), or nefazodone; a barbiturate such as amitriptylline (Elavil, Vanatrip, Limbitrol), clomipramine (Anafranil), desipramine (Norpramin), fluoxetine (Prozac, Sarafem, Symbyax), fluvoxamine (Luvox), paroxetine (Paxil, Pexeva), sertraline (Zoloft), and others; or migraine headache medicine such as aspirin (Anacin, Excedrin), acetaminophen (Tylenol), aspirin, celecoxib (Celebrex), diclofenac (Arthrotec, Cambia, Cataflam, Voltaren, Flector Pennsaid,