The doctor may ask if the person has a history of any of the following: People should also avoid certain antifungal medications and antibiotics when taking Cialis.Īnybody who is considering taking medications such as Cialis for ED should always involve their doctor in the decision. People should not use it with guanylate cyclase stimulators or blood pressure medications, as this combination can trigger an unsafe dip in blood pressure.Ī person who is taking Cialis and has prostate problems should avoid prescription alpha-blockers, as Cialis serves the same function. CialisĬialis may have some more serious side effects.
The study found that 3.7 percent of skin cancer cases in men who used the drug sildenafil might have been prevented by not taking it. Any drugs for pulmonary hypertension may also interact with Viagra, causing blood pressure to drop to unsafe levels.Ī recent study in JAMA Internal Medicine has suggested that Viagra could increase the risk of skin cancer. Interactions with Viagra do occur, and it is important for people to be aware of them before choosing a medication for ED. There are some drug-specific side effects to be aware of, however. Nitrates will also interact with these drugs, so people should not use them together. Viagra, Cialis, Levitra, and Stendra all come from the same class of chemicals, and they have many similar side effects and interactions.įor instance, manufacturers recommend not taking PDE5 inhibitors with grapefruit or grapefruit juice, because the fruit may affect how the drugs work.
A person takes the drug 30 minutes to 1 hour before sexual activity, and the effects typically last for 3-5 hours.