Developed by Sun Pharma, Modula is called the weekend pill due to its 36-hour duration of action. The drug’s prolonged efficacy and the option to take daily have Modula popular. Please note that the drug does not give a straight 36-hour erection. It means the drug remains in the body for up to 36 hours after dosage so you will be able to get or sustain an erection multiple times during that period, helping you indulge in sexual activity several times.