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Additionally, tadalafil is metabolized by CYP3A4 in the liver. Dosage adjustments are necessary in patients taking potent CYP3A4 inhibitors such as ritonavir, ketoconazole, and itraconazole (see Dosage and Drug Interactions). It can also interact with many medicines, particularly nitrates (used in some types of heart disease) and blood pressure medicines. If you take nitrates in any form, or are on treatment for pulmonary hypertension, you should not take tadalafil.

Additionally, certain risk factors increase the risk of ED, such as smoking, lack of exercise, and drug or alcohol use. Most commonly, the natural aging process limits blood flow into the penis. The manufacturer's advice is that Cialis tablets are not suitable to be split, and patients should use the minimum effective dose as a whole tablet. Cialis tablets are film-coated, however this is not an extended or delayed release coating (to achieve delayed absorption), so tablets should actually be safe to split, in order to take a lower dose.

Follow the prescription provided by the doctor and do not make any changes to it without consulting your doctor. Sudden loss or decrease in hearing, sometimes with ringing in the ears and dizziness, has been rarely reported in people taking PDE5 inhibitors, including CIALIS. It is not possible to determine whether these events are related directly to the PDE5 inhibitors, to other diseases or medications, to other factors, or to a combination of factors. If you experience these symptoms, stop taking CIALIS and contact a healthcare provider right away. In rare instances, men taking PDE5 inhibitors (oral erectile dysfunction medicines, including CIALIS) reported sudden decrease or loss of vision in one or both eyes. It is uncertain whether PDE5 inhibitors directly cause the vision loss.

If your dose is different, do not change it unless your doctor tells you to do so. Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of tadalafil in the elderly. However, elderly patients are more sensitive to the effects of this medicine than younger adults. Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines.

The dose of Cialis you need will depend on whether you’re taking it daily or as needed. The as-needed dose is usually 10 mg but can range from 5–20 mg. Your healthcare provider will discuss which dose is right for you. The timing of your sexual activity does not matter as it’s a prolonged therapy.

Priapism can lead to permanent damage to the penis and is a medical emergency requiring urgent medical attention through a hospital A&amp