Learn More About Vitamin B-12 Contraindications Tell your provider about your other medicines, especially: chloramphenicol, colchicine, antibiotics, metformin, or medicines that reduce stomach acid, such as cimetidine (Tagamet), omeprazole (Prilosec), lansoprazole (Prevacid), esomeprazole (Nexium), and ranitidine (Zantac)
On Adderall XR, extending that buffer to 4 hours is reasonable
The most commonly reported side effects at therapeutic doses include mild nausea, particularly in the first week of a protocol, which typically resolves by day 7 to 10 without any dose adjustment
Metformin (1,1-Dimethylbiguanide hydrochloride, Sigma-Aldrich