Many patients often have the experience of visiting different departments for several diseases, and each doctor has issued a prescription, can these drugs prescribed by different doctors be taken together? Question 2: Can I take several medications prescribed by the doctor at the same time together or at intervals? Should I take them before a meal? Or after a meal? Will there be interactions between these medications and how can they be avoided? These questions are probably best addressed by consulting a pharmacist. Drug interactions include both drug-drug interactions and food and beverage interactions with drugs. Drug interactions can either enhance or diminish each other. Sometimes it is an enhancement of the drug’s effect, sometimes it is a superimposition of side effects. Food may potentiate or reduce the effectiveness of a drug. Drug interactions have favorable and unfavorable aspects, mainly including: 1) affecting absorption; 2) affecting metabolism and excretion; 3) increasing the efficacy; 4) decreasing the efficacy; 5) increasing adverse reactions; 6) decreasing side effects, etc. Therefore, we should make full use of the favorable drug interactions and avoid the harmful drug interactions. Hospital pharmacists should be consulted for professional guidance on drug interactions.