In the United States, tadalafil has FDA approval and became available in December, 2003 as the third impotence pill after sildenafil (Viagra) and vardenafil (Levitra). Due to its 36-hour effect it is also known as the weekend pill. It should be noted that the drug has not been formally studied in regard to multiple sexual attempts during a 36 hour period.
Other, less serious side effects may be more likely to occur. Continue to
take tadalafil and talk to your doctor if you experience
» headache;
» indigestion;
» back pain;
» muscle aches;
» flushing;
» stuffy or runny nose; or
» temporary blue tint in vision or difficulty telling thedifference between the colors blue and green (uncommon).
Side effects other than those listed here may also occur. Talk to your doctor
about any side effect that seems unusual or that is especially bothersome.
Tadalafil is used as needed, so you are not likely to miss a dose.