The recommended dose is 50 mg taken as needed approximately one hour before sexual activity. Based on efficacy and tolerability, the dose may be increased to 100 mg or decreased to 25 mg. The maximum recommended dose is 100 mg.
Ivan IV, Ivan the Fourth, also known as Ivan the Terrible, was the first ruler of Russia to give himself the title tsar. This happened in 1547. The first czar of Russia was Ivan IV (Grozny) Before that sovereigns of Russia used title The Great Knyaz. Ivan Grozny was the first Russia's sovereign, who officially used the Czar in title. Both part were used together - Czar and the Great Knyaz.
(October 2013) This is a list of all reigning monarchs in the history of Russia. It includes titles Prince of Novgorod, Grand Prince of Kiev, Grand Prince of Vladimir, Grand Prince of Moscow, Tsar of All Rus', and Emperor of All Russia. The list started with a semi-legendary Prince of Novgorod Rurik sometime in the mid 9th century and ended with the Emperor of All Russia Nicholas II who abdicated in 1917, and was executed with his family in 1918. The vast territory known today as Russia covers an area that has