When the drug has been extracted from its original source and stored in a proper condition it manufacturer starts it use and is manufactured it starts loosing its potential.
The expiration date does not indicate that the drug has lost its potential and its efficacy.
At coming near to the expiration date it does not mean that your drug has lost its potency and safety.
Therefore, some of the medicines should not be taken after their expiry.They are: This factors should be strictly followed for proper preservation of the medicines.An program called SLEP () which was conducted for reducing the cost of medicine for the army.They experimented on about 122 different medicines and found that 88% from this 122 drugs when stored in proper conditions have an average of extension of 66 months and a maximum extension of 278 months.Ongoing research shows that stored under optimal conditions, many drugs retain 90% of their potency for at least five years after the labeled expiration date, and sometimes longer.
Even 10 years after the expiration date many pharmaceuticals retain a significant amount of their original potency Important note: Solid dosage forms, such as tablets and capsules, are most stable past their expiration date.In general, drugs expiration date is 2-5 years from production date.FDA regulations do not require manufacturers to determine actual long-term drug potency and stability.Yes, if the patients is not able to replace the expired medication with the new ones and the medicine is not life saving drugs or life threatening drugs and their is no evidences for its hazardous effects after the expiry you can take it.Also if the medication is used for the symptoms like cough, cold, sneezing, headache, hay fever, mild pain or any other normal symptoms.But, its just an symbol of assurance that is provided by the manufacturer for its 100% potential and efficacy.