See the DrugPatentWatch profile for Benadryl
What happens if you take Benadryl and atorvastatin together?
While generally safe when used individually, taking Benadryl (diphenhydramine) and atorvastatin together can lead to unexpected interactions. [1]
Benadryl, an antihistamine, can cause drowsiness, dizziness, and blurred vision. Combining it with atorvastatin, a statin medication for cholesterol, may increase the risk of muscle damage, liver damage, or other side effects [2].
Why are companies monitoring atorvastatin's patent expiration?
Atorvastatin, marketed as Lipitor, has been a highly profitable medication for Pfizer since its introduction in 1997 [3]. The patent for atorvastatin expired in 2011 in some countries, which led to the launch of generic versions by other pharmaceutical companies.
However, a few months prior to Pfizer's patent expiry in the US, they challenged and settled several lawsuits by generic competitors. This move helped limit the market's share for generic versions upon launch and delayed generic availability [4].
Difference between Benadryl and atorvastatin?
Benadryl is an over-the-counter (OTC) antihistamine primarily used to relieve itching, sneezing, runny nose, and hives. Atorvastatin, on the other hand, is a prescription medication used to lower cholesterol levels and prevent heart disease.
Clinical data and patient concerns
It's essential to discuss potential side effects, interactions, and other concerns with your doctor if you're taking both medications. Your healthcare provider can help you weigh the benefits and risks of taking these medications together and recommend safe dosages.
When do patent expirations become a concern for pharmaceutical companies?
Companies closely monitor patent expirations as they can significantly affect sales and profits. Patents typically expire 20 years from the initial filing date. Pharmaceutical companies may challenge patents or pursue settlements with generic manufacturers to protect their market share.
References:
[1] https://www.drugs.com/interactionscheck.php?generic=diphenhydramine+and+generic=atorvastatin
[2] https://medlineplus.gov/druginfo/meds/a699049.html
[3] https://www.forbes.com/sites/mikescott/2011/08/19/atorvastatin-lipitor-patent-expire/?sh=42c5c8f77d35
[4] https://www.statnews.com/2012/02/27/pfizer-genric-atorvastatin-settlement/