It is important to tell your doctor about any heart problems you have now or may have had in the past. Ethanol Other Medical Problems The presence of other medical problems may affect the use of this medicine. For treatment of erectile dysfunction as needed : Adults—10 milligrams mg as a single dose, no more than once a day, taken 30 minutes before you think sexual activity may occur. If you need emergency medical care for a heart problem, it is important that your doctor knows when you last took tadalafil. Ask your doctor if you have any questions. If you take too much tadalafil or take it together with these medicines, the chance for side effects will be higher. · Taking Cialis with food. You can take Cialis with or without food. Can Cialis be crushed, split, or chewed? You should not crush, split, or chew Cialis. Swallow the tablet whole. Taking Cialis with food. You can take Cialis with or without food. Can Cialis be crushed, split, or chewed? You should not crush, split, or chew Cialis. Swallow the tablet whole.  · Conclusion: Cialis dose not have a coating on it so it is not time released and can be split. Cialis doesn’t have a score line so it is hard to split into equal parts. All tablets are made to have a % homogeneous mixture, so .