how often can you take viagra

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You can take Viagra (sildenafil) usually once every 24 hours. The typical starting dose is 50 mg, but your healthcare provider may adjust the dosage between 25 mg and 100 mg based on how well it works and your tolerance. It is important not to take more than the prescribed dose or take it more than once a day, as this can increase the risk of serious side effects such as low blood pressure or priapism (a prolonged erection requiring emergency care). If a dose does not work, you should wait at least 24 hours before taking another one. Viagra generally starts working within 30 to 60 minutes and works for about 4 hours. For daily use or more frequent sexual activity, other medications like tadalafil (Cialis) may be recommended after consulting with a healthcare provider.