Because they are the same class of medications, they have similar side effects and effectiveness. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. Cialis, known by its scientific name ‘Tadalafil’, is a medication commonly known for treating erectile dysfunction ED and symptoms of benign prostatic hyperplasia BPH. Erectile dysfunction can be caused by a variety of factors , including age, cardiovascular problems, diabetes, and other conditions that affect nerve function or blood flow. Here are some key factors to consider when deciding: Pricing: Know how much your monthly supply will cost with shipping and tax. Medicines that block an enzyme called CYP3A4. It’s not just a medication for momentary pleasure; it has a lasting impression on heart health.avanafil (Stendra) sildenafil (Viagra) tadalafil (Cialis) vardenafil (Levitra, Staxyn) Caution: Do not use these ED medications if you take nitrates, such as nitroglycerin or a similar. You need a prescription to get Cialis, which you can acquire through your doctor or telehealth sources. Online ordering can be a great alternative if you prefer the convenience and discretion. Sildenafil (Viagra) and tadalafil (Cialis) are the most commonly prescribed medications for ED, and they have the longest track record. For occasional use, most people start with sildenafil. For regular use, tadalafil can be a better fit. Some people prefer to alternate between medications. All ED meds are equally safe and effective.