Fildena Double 200 mg can expire, just like other medicines. If it contains sildenafil, the expiration date is determined by the manufacturer and is printed on the blister strip or carton as “EXP”. Don't use it after the printed expiry date. Don't assume it is safe based on how the tablet looks. Fildena Double 200 mg it according to the package instructions, generally in a cool, dry place away from direct heat and moisture. 200 mg sildenafil is above the usual recommended maximum single dose of 100 mg, so it should not be taken unless specifically prescribed by a clinician. If you tell me the EXP date printed on your Fildena Double strip, I can tell you whether it has expired.