Yes, ED pills can cause side effects. Cialis is an approved medication to treat this condition, despite its other function as a treatment for impotence. Levitra vardenafil : This medication is taken one hour before sex and can last up to 24 hours. This is not a complete list of interactions; others may occur with Cialis. You can talk to your healthcare provider about the best dosage for you.AdReviews and Comparisons Of The Best Male Enhancement Products. See Which Products Work. Trust Our Unbiased Reviews and Improve Your Sexual Health in Confidence!Over 20 Years Online · Over Products Tested · Honest & Unbiased Reviews.  · MA. masso 5 Oct “Splitting or crushing tadalafil tablets may result in a patient receiving more or less than the prescribed dose. Data are not available to support any alternative dosing options beyond specific dosing/administration according to the approved tadalafil label.” Lilly Medical. To speak to customer support: Call () 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.