Does Fentinol make you sleepy?
Fentinol can make you feel sleepy (sedation, somnolence, and drowsiness). Please consult your doctor if you feel very sleepy after taking Fentinol, especially during the first few weeks of treatment or following a dose increase. Talk to your doctor as you may be advised not to drive or use machines until it is established that your ability to perform such activities is not affected.