That means that an alternate version of the class template code can be provided when some of the template parameters are known, while leaving other template parameters generic. Do not take more or less of it or take it more often than prescribed by your doctor. Take tadalafil at around the same time every day. How Does FDA monitor side effects or safety issues with generic medicines? One of the first Cialis ads aired at the Super Bowl. Tadalafil will make these symptoms less severe and reduce the chance that prostate surgery will be needed.We have good news for you: generic Cialis, used to treat erectile dysfunction (ED)and enlarged prostates, just hit pharmacies. Prices for the generic, . Side Effects. Headache, stomach upset, back pain, muscle pain, stuffy nose, flushing, or dizziness may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To. Tadalafil is in a class of medications called phosphodiesterase (PDE) inhibitors. It works to treat erectile dysfunction by increasing blood flow to the penis during sexual stimulation. .