Cialis is the trade name and the generic name is Tadalafil Tablets.The side effects of Tadalafil Tablets are headache, dyspepsia, back pain, nasal congestion, and myalgia. Tadalafil tablets belong to the group of selective, reversible inhibitors of cyclic guanosine monophosphate-specific phosphodiesterases. Pharmacologically, the common side effects of tadalafil tablets are headache and dyspepsia. Apart from this, other uncommon side effects are back pain, nasal congestion, myalgia, nasopharyngitis, nasal congestion, and facial flushing. Tadalafil tablets are mainly used clinically for the treatment of erectile dysfunction. Pregnant and breastfeeding women, as well as people under the age of 18 should not take this medicine, and if you are allergic to tadalafil tablets, you need to avoid taking them as well. To summarize, patients must take tadalafil tablets under the guidance of a doctor, do not self-medication, in order to avoid delaying the condition, causing discomfort to the health.