Drug Uses & More Tadalis is an oral therapy for curing ED. It is a generic version of Cialis, which means that it has the same active ingredients as Cialis but is cheaper in price. Another advantage is that the drug has an effective time of up to 36 hours. Usage Information for Tadalis Ask your doctor for detailed instructions on using Tadalis. On the other hand, you can always refer the patient information booklet which contains professional instructions regarding medication usage. Tadalis is absorbed into the body depending on ones health. So, the time often differs in different people. Under normal circumstances, it is most effective when taken around 30 minutes before you plan to commence sexual activity. Tadalis will keep you primed for up to 36 hours. Dosage Missed? Important Information Tadalis is taken only as and when required. It is not to be used every day as a regular therapy. So, the problem of a missed dose does not arise. If you accidentally missed to take the medication prior to having sex, then you can take it as soon as you remember it. But then you will have to wait for the stipulated amount of time for Tadalis to be absorbed by the body and start to take effect. Storing Tadalis We recommend storing your medications at room temperature (59 and 86 degrees F) in its original container. Keep it away from excessive heat, moisture or light. Protect it from kids and pets. I think that I overdosed. What should I do? Seek emergency medical care if you suspect an overdose. Contact the nearest poison control center immediately.