Tadalafil is in a class of medications called phosphodiesterase PDE inhibitors. Your doctor will probably tell you not to take tadalafil if you are taking street drugs containing nitrates. You can take this medicine with or without food 30 minutes before sex, depending on the dose. Your doctor may need to change the doses of your medications or monitor you carefully for side effects. As with sildenafil, a high-fat meal or alcohol keep the body from absorbing it as quickly. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. Customers can now explore information and advice alongside relevant products and services for a wide range of conditions at the Boots Health Hub.Here are five things to know about the new topical gel and how it can help if you’re struggling to get an erection: 1. It Targets the Problem and Works Quickly. Being a topical means MED Save £ Was £ 4 UNI | £ per 1UNI. Save 10 percent on Cialis Together 10mg Tablets Tadalafil 4 Tablets. Free next day delivery on selected medicines when you use code HEALTHFNDD, order by 8pm – online only. Helps you get and maintain an erection when you need it. Effective up to 36 hours. Side Effects. Headache, stomach upset, back pain, muscle pain, stuffy nose, flushing, or dizziness may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To.