Cialis is one of the most selective phosphodiesterase-5 inhibitor’s, and therefore the side effects appear rarely during its usage in comparison with the use of other ED pills. Using Cialis the side effects are hardly probable from the side of the visual organs or cardiovascular system. It may be explained by the gradual prolonged release of Tadalafil to the blood, so that the high concentration of this component is not observed in the blood, and it is reduced during the prolonged use of the drug.

The side effects of Cialis are not related to food, and that is why you may consume any food and even take some alcohol in combination with Cialis.

The side effects of Cialis are conditioned by its therapeutic action. As a result of the dilation of the penis vessels and blood filling of the cavernous bodies  the man may feel a light headache, dizziness, or dyspepsia. These are the most common side effects of Cialis which are known in the medical practice.

Other usual unwanted effects which are rarely met in the medical practice are: pain in back, myalgia, nasal stuffiness, and flush.

Viagra causes more expressed side effects, and therefore Cialis may be considered one of the safest drugs from the treatment of the erectile dysfunction. Men with cardiovascular diseases should follow a special caution because the probability of the side effects is higher. The direct influence of Tadalafil on the cardiac function, pain in the chest, tachycardia is not proved but Cialis is used for sex which may be contraindicated in this category of patients.

Any sex is an intense physical activity, and if you have sick heart, such physical activity with the additional sexual stimulators may be contraindicated.

The intensity of the side effects of Cialis may be increased in case of the interaction of Tadalafil with some medical ingredients: organic nitrates, nitroglycerine, antiviral drugs, antacid, and other drugs for the treatment of the erectile dysfunction.

Using Cialis and Viagra the pharmacological action of both drugs is increased, so that the probability of the side effects of Cialis grows. In case of the use of the middle dosages of Cialis and avoiding the daily dosage no side effects will bother the quality sexual intercourse in 3-4 uses.