Viagra is the trade name, generic name of sildenafil citrate tablets, taking this drug has the effect of treating erectile dysfunction in men, you need to follow the doctor’s instructions to use the drug.
Sildenafil citrate tablets enhance the nitric oxide (NO)-cGMP pathway by selectively inhibiting PDE5, elevating cGMP levels and causing relaxation of penile cavernous smooth muscle, so that patients with erectile dysfunction produce a natural erectile response to sexual stimulation. Therefore, it can treat erectile dysfunction.
However, it should be noted that this drug is contraindicated in people who are allergic to it, or who are using nitrate drugs (e.g., nitroglycerin), or guanylate cyclase agonists (e.g., leucovorin). It can also not be used in women, children, those who have recent cardiovascular contraindications to sexual life. There is also the possibility of adverse reactions such as headache, shock, fatigue, pain, etc. during the use of the drug.
Therefore, if there is a real need for sildenafil citrate tablets, it must be used under the guidance of a doctor, do not blindly use the drug or increase or decrease the dosage on their own, so as not to cause adverse consequences.