Yes, Caverta 100 mg (which contains Sildenafil, the same active ingredient as Viagra) is typically effective within 30 to 60 minutes after taking it. However, the exact time can vary depending on several factors, such as:

Individual Response: People respond differently to medications, so it may take a bit longer for some individuals to experience the full effects.

Meal Timing: If you take Caverta 100 mg after a heavy meal, especially one high in fat, it may take longer for the medication to take effect because food can slow down its absorption. Taking it on an empty stomach can lead to faster onset of action.

Sexual Stimulation: For Caverta 100 mg to work effectively, sexual arousal and stimulation are necessary. The medication helps improve blood flow to the penis, but it doesn’t cause an erection without sexual stimulation.

Typically, the medication lasts for 4 to 6 hours, allowing enough time for sexual activity within that window after taking it. If you have any concerns about timing or effectiveness, it's always a good idea to discuss it with your healthcare provider.