A higher dose of tadalafil is needed if your body does not respond to the recommended dose. Find answers Which Tadalafil dosage is right for me? Read more in our editorial policy. The trade-off is that the higher the strength, the greater the chance of side-effects and adverse events. Limiting your alcohol intake, getting plenty of exercise and not taking it after a big meal can sometimes can help your response to the drug.SIDE EFFECTS: Headache, stomach upset, back pain, muscle pain, stuffy nose, flushing, or dizziness may occur. If any of these effects persist or worsen, tell your doctor or . Tadalafil is the active ingredient in a branded drug called Cialis. Tadalafil is approved by the FDA to treat erectile dysfunction. It’s available from Lemonaid in 5mg, 10mg and . We have good news for you: generic Cialis, used to treat erectile dysfunction (ED)and enlarged prostates, just hit pharmacies. Prices for the generic, known as tadalafil, are .