Tadalafil
Cialis is framed here as a similar tablet-based option to Viagra, but with a different overall feel and duration for some people.
Similar to Viagra but made by Lilly, it comes in strengths of 5, 10 and 20mg.
The advantage of this one is that once it is in your system, you can find yourself getting the occasional spontaneous erection, which can come in useful on some occasions.
Common strengths: 5mg, 10mg, 20mg
Described as more spontaneous
Comparison Note
There is another tablet similar to Viagra and Cialis called vardenafil, but the original note suggests the broad experience may be similar and something to discuss with a GP or consultant.
Caution
Recreational drugs can have a negative effect on the performance of tadalafil. This content remains informational rather than prescriptive.