Read and follow these instructions carefully. What if I am taking other drugs? This condition may require prompt medical treatment to prevent serious and permanent damage to your penis. Take tadalafil at around the same time every day. Do not keep outdated medicine or medicine no longer needed. CIALIS can cause your blood pressure to drop suddenly to an unsafe level if it is taken with any nitrate medication. · Cialis and Levitra are both brand-name drugs. Currently, there are generic forms of both drugs. The generic form of Cialis is called tadalafil. The generic form of Levitra is called. The recommended starting dose for Cialis intended for once daily use is mg, take at the same time each day, without regard to timing of sexual activity. This may be increased to 5mg/day based on need and tolerability. May be taken with or without food. Cialis is available as a generic, under the name tadalafil. 3. Has a generic version of Cialis been approved? Yes. The following products are equivalent to Cialis: tadalafil tablet;oral. Manufacturer: ACCORD HLTHCARE. Approval date: March 26, Strength (s): MG [ AB1], 5MG [ AB1], 20MG [ AB1] Manufacturer: ACCORD HLTHCARE. Approval date: October 23, Strength (s): 10MG [ AB1].