So, the direct answer to your question is the shelf life is several years. When drugs are manufactured, they typically have a shelf life of several years, usually about 4 years. The problem is that it is impossible for the patient to know how long the drug has been sitting on the shelf in various locations (distribution centers, local pharmacy, etc.). All of the drugs are labeled with expiration dates in the bottles that are distributed to the pharmacies, but when the pharmacies count out the prescribed amount, they usually do not label the patient’s bottle with the expiration date. If a medicine is dispensed that the Pharmacists know will be taken quickly, such as an antibiotic for an acute infection, they will routinely assure that the drug is in date, but it could expire next month. If a medicine is dispensed that the Pharmacists know will be taken as needed, such as valacyclovir for episodic cold sores, they will routinely assure that the drug will not expire for at least a year, but the patient usually has not way of knowing how long beyond that year. In addition, it is also important to realize that it is not critical to be precise about the expiration date. The dose in immunocompromised patients is 1000 mg three times daily for at least seven days (3000 mg total daily dose) and for 2 days following crusting of lesions. This dose should be reduced according to creatinine clearance (see Renal impairment below). For recurrent episodes, treatment should be for three to five days. For initial episodes, which can be more severe, treatment may have to be extended to ten days. For recurrent episodes of herpes simplex, this should ideally be during the prodromal period or immediately upon appearance of the first signs or symptoms. Valtrex can prevent lesion development when taken at the first signs and symptoms of an HSV recurrence. For herpes labialis (cold sores), valaciclovir 2000 mg twice daily for one day is effective treatment in adults and adolescents. The second dose should be taken about 12 h (no sooner than 6 h) after the first dose. Side effects of metformin 1000 mg Cialis 50 mg Clonidine canada During hemodialysis, the half─life of acyclovir after administration of VALTREX is approximately 4 hours. About one-third of acyclovir in the body is removed by. Hello from JustAnswer. Well, that is actually a complex answer. When drugs are manufactured, they typically have a shelf life of several years. Valtrex valacyclovir hydrochloride has a nominal shelf life of three years. There might be some variation among generics, but there should be no reason for it being different for the non-Glaxo. All drugs have an expiration date based on stability studies performed. On your prescription bottle, there should be a date of expiration; if you have any questions, your local pharmacist can help. Read more See 1 more doctor answer We all know that medications last beyond their expiration dates. Not the manufacturer who has an interest in you buying more drugs. A recent review in JAMA in 2012 reviewed this subject. But no, if you need to use a drug, I would follow the expiration date on the package. Read more nitroglycerin is pretty sensitive to light and won't last long - check the bottle for expiration date, and don't count on it to help past that time. Sealed containers from drug companies all have expiratory dates printed or stamped. if you mean glycerol (like for inducing BM) that is unlikely to ever go bad. Bactrim (sulfamethoxazole and trimethoprim) invariable has shelf life of at least a year, and likely is perfectly good for at least couple of years & does not require refrigeration. Read more See 1 more doctor answer Of course these are just standards for a general population. But, therapeutic levels represents a blood concentration that is high enough to see the effect of the medication still working. Blood levels of the chemical/drug/medicine are detectable but not at a level to provide with the well known effect of the medication. Read more From what I understand in the packaging of shelf-stable milk such as Tetra pack, there is no additional preservatives. After this, they start to lose their stability and efficacy. You should see an expiration date on your bottle of sunscreen and should use it before that date. If you don't see an expiration date, write the month and year you purchased it on the bottle and toss after three years. Do not use any sunscreen that has become lumpy or has turned an odd color. Read more See 4 more doctor answers If you start the medication right at the first sign of an outbreak(tingling/burning/pain/feverish) you have a better chance of a quick clearing. Usual time frame for the blisters to turn into scabs and then the scabs to heal is 5-12 days. Read more Usually "beyond use" date is printed on the pharmacy container at dispensing. Each med is different and some meds should not be used beyond "expiration." for example: insulin, epinephrine, nitroglycerine and vaccines lose potency beyond their dates. Read more It is never a good idea to take medications that are expired. Most medicines are usually good far beyond those dates. However, with a vast majority of medications, it should be noted that the expiration date on the package does not mean the product is rendered useless the day after the expiration date. If within a few days of the expiration date, i suggest contacting your pharmacist for an opinion. Valacyclovir shelf life VALACYCLOVIR, What is the shelf life of valacyclovir? i have a prescription given to. Namenda titration directionsCiprofloxacin ear drops cost Jan 2, 2015. Hello from JustAnswer. Well, that is actually a complex answer. When drugs are manufactured, they typically have a shelf life of several years. What is the shelf life of valacyclovir? i have a prescription given to me.. What is the shelf life of Valtrex -. VALTREX TABLETS 500MG. It turns out that the FDA, the agency that helps set the dates, has long known the shelf life of some drugs can be extended, sometimes by years. What is the shelf life of valacyclovir? i have a what is the shelf life. what is the shelf life of valacyclovir? i have a prescription given to me a year ago and haven't used. i have a cold sore coming on and want to take the medication Can i take a drug called Valacyclovir HCL if the expiration date is 2/5/11? - Answered by a verified Doctor. does alprazolam have a shelf life? If so,approx how.