I always check my meds - usually if the manufacturer changes - the pharmacist will notify you or they will stick a giant sticker on the bottle to notify you - also you can go online at pill identifier and put in all the marks, pill shape, color, etc and it will tell you what it is and the mg. My solution is - I go to the same pharmacy every month - I have only used two pharmacies in the last 20 years - they know me and if I have problems I can clear them up quickly. Just like my bank and credit cards - I don't change those either - we all know each other and our habits if something goes wrong we all know it instantly.