Yes, Cenforce FM 100 mg (which contains sildenafil citrate) is generally absorbed more quickly on an empty stomach compared to when taken with food. Here's why:

1. Absorption Rate: Sildenafil citrate, the active ingredient in Cenforce FM 100 mg, is absorbed faster when taken on an empty stomach because there is less interference from food in the digestive tract. Food, especially high-fat meals, can delay the absorption of sildenafil, leading to a longer onset time.
   
2. Onset of Action: Taking Cenforce FM 100mg on an empty stomach typically results in a faster onset of action, usually within 30 to 60 minutes. This allows the medication to be absorbed into the bloodstream more quickly, leading to quicker effects on erectile function.
   
3. Effectiveness: While taking sildenafil with food may not reduce its effectiveness significantly, it may delay the time it takes for the medication to reach peak effectiveness. For optimal results, especially if you desire faster onset of action, it's generally recommended to take Cenforce FM 100 mg on an empty stomach or with a light meal.
   
4. Consistency: Taking sildenafil under consistent conditions (either always on an empty stomach or always with a meal) helps maintain predictability in terms of onset time and effectiveness. This consistency allows for better planning around sexual activity.
   

However, it's important to note that individual responses to medications can vary. Some individuals may experience effective results even when taking Cenforce FM 100 mg with food. Always follow the instructions provided by your healthcare provider or the medication label for the best guidance on how to take this medication for your specific needs. If you have concerns or questions about the timing of taking Cenforce FM 100 mg, consult with your healthcare provider for personalized advice.