Common Use

Cialis is a highly effective, reversible, and selective inhibitor of phosphodiesterase type 5 (PDE 5), specifically targeting cyclic guanosine monophosphate (cGMP). During sexual stimulation, the local release of nitric oxide triggers the inhibition of PDE 5 by Cialis, leading to an increase in cGMP levels within the penile cavernous body. This process relaxes arterial smooth muscles and enhances blood flow to the penile tissues, resulting in erections. It is important to note that Cialis only works in the presence of sexual stimulation. The medication improves erectile function, enabling successful sexual intercourse. Its effects last for up to 36 hours, and if sexual arousal is present, the effects can be observed as early as 16 minutes after consumption.

Dosage and Direction

The recommended dosage of Cialis is 20 mg, which should be taken at least 16 minutes before sexual activity. The effects of the drug persist for up to 36 hours. It should be taken once daily, and the recommended dose should not be exceeded.

Precautions

It is advisable to avoid consuming Cialis with grapefruit juice, alcoholic beverages, or tobacco. Combining tobacco use with Cialis may increase the risk of NAION (sudden optic nerve-related vision loss). Consult your doctor before taking Cialis if you have any of the following conditions or medical history:

• Abnormal penis shape, including curvature or birth defects
• Coronary artery disease, arrhythmia, angina, heart attack, or heart failure
• Hypotension or hypertension
• Bleeding disorders or stomach ulcers
• Diabetes or hyperlipidemia (excess lipids in the blood)
• Sickle-cell anemia
• Liver or kidney failure

Contraindications

Cialis is contraindicated in patients using any form of organic nitrate, whether regularly or intermittently, as it can significantly enhance the hypotensive effects of nitrates.

Possible Side Effects

The most common side effects of Cialis include:

• Facial flushing (reddening)
• Headaches
• Stomach upset
• Diarrhea
• Flu-like symptoms
• Nausea

In rare cases, the following may occur:

• Low blood pressure
• Blurred vision or changes in color vision
• Abnormal ejaculation
• Prolonged erections or priapism (painful erections lasting more than 6 hours)

If an erection lasts longer than 4 hours, seek immediate medical attention to prevent permanent damage to the penis. Patients with pre-existing heart conditions may experience aggravated symptoms when using Cialis.

Drug Interactions

Combining Cialis with medications containing organic nitrates can lead to severe hypotension, which can be dangerous. Avoid taking Cialis with the following medications:

• Erythrityl Tetranitrate
• Isosorbide Dinitrate
• Isosorbide Mononitrate
• Nitroglycerin
• Pentaerythritol Tetranitrate

The levels and toxicity of Cialis may be increased by medications such as erythromycin, ketoconazole (Nizoral), itraconazole (Sporanox), indinavir (Crixivan), and ritonavir (Norvir). Inform your doctor if you are taking any of the following, as your Cialis dosage may require adjustment:

• Atazanavir
• Bunazosin
• Clarithromycin
• Doxazosin
• Moxisylyte
• Nefazodone
• Nelfinavir
• Phenoxybenzamine
• Phentolamine
• Prazosin
• Saquinavir
• Telithromycin
• Terazosin
• Trimazosin
• Urapidil

Missed Dose

A missed dose is not applicable for Cialis when used for erectile dysfunction, as it is taken on an as-needed basis.

Overdose

An overdose of Cialis may result in symptoms similar to its side effects. If you suspect an overdose, seek immediate medical assistance.

Storage

Store Cialis at room temperature in a tightly sealed container, away from moisture, sunlight, children, and pets.

Disclaimer

The information provided here is general and does not cover all possible directions, drug interactions, or precautions. It should not be used for self-treatment or self-diagnosis. Always consult your healthcare advisor or doctor for specific instructions tailored to your condition. We disclaim any responsibility for the reliability of this information or potential errors. We are not liable for any direct, indirect, special, or consequential damages resulting from the use of this information or self-treatment practices.