Vice President Mohammad Reza Rahimi said the country has stockpiled the population's daily needs to reduce the impact of the embargo hitting the oil and banking sectors.
“Today, we are facing the heaviest of sanctions and we ask people to help officials in this battle,” Rahimi was quoted by state television's website as saying at a religious conference.
He said the “dastardly sanctions” might cause “occasional confusion” in the market, but that the Iranian nation would not be stopped.
Central bank governor Mahmoud Bahmani also told the semiofficial Mehr news agency that Iran has “plans” to deal with the embargo and enough hard currency to meet its import needs.
The EU said earlier this week that all contracts for importing Iranian oil will have to be terminated from Sunday. Also, European companies will no longer be involved in insuring Iranian oil.
The measures come on top of previous sanctions levied by the U.S. and the West that have already hit Iran's economy.
U.S. officials say the American sanctions have cut exports of Iranian crude from about 2.5 million barrels a day last year to between 1.2 and 1.8 million barrels now.
“We have not remained passive. To confront the sanctions, we have plans in progress,” said Bahmani. He did not elaborate on the plans.
On Saturday Bahmani said Iran is “easily” selling its oil despite all current and future sanctions because some countries have received waivers from the U.S. to import some Iranian oil despite the punitive measures.
The State Department has announced that China, India, Japan, Malaysia, South Korea, Singapore, South Africa, Sri Lanka, Turkey and Taiwan have been given waivers from the U.S. in exchange for “significantly reducing” oil imports.
Iran's Oil Minister Rostam Ghasemi meanwhile ordered his staff to “mobilize” against “illegal sanctions,” Mehr said. It did not say what the measures were.
Late Saturday Ghasemi told state television that Iran has weathered previous rounds of sanctions. “I do not see it as a problem that enemies have imposed an embargo today,” he said. “Simply, because they have imposed similar sanctions years ago, and nothing happened.”
He said Iran has already stopped selling oil to many EU countries and sold to others instead. “Developing countries and countries with fast economic growth have no alternative to oil. Fortunately, because of the quality of our country's oil, all are interest in using it.”
The U.S. and EU measures are intended to pressure Iran over fears that it is developing nuclear weapons.
Iran denies the charges, saying its nuclear program is aimed at peaceful purposes like power generation and cancer treatment.