Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns. As per your complain Metoprolol is a beta blocker medication and it is used to treat high blood pressure.. Metoprolol does not have any direct effect over the teeth and does not led to tooth decay but it has a side effect of causing dry mouth and in the absence of sufficient amout of saliva in mouth the flushing of debris and bacteria is reduced and more accumulation of debris and bacteria will increase the infection and increased incidence of tooth decay and gum diseases.. I would suggest you consult an Oral Physician and get evaluated and a thorough clinical evaluation can help.. You can be advised to chew sugar free chewing gums and suck tart candies to stimulate saliva flow.. Gargling with specialized mouthwash that are formulated for dry mouth patients and instilled artificial saliva drops can help.. Drink plenty of water.. Always gargle after meals.. You can maintain a good oral hygiene by brushing teeth twice a day. Regular dental checkups and treatment of decays can help in conserving natural teeth.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.