Taking Claritin and Benadryl together or too close can amplify side effects and is generally not recommended. A minimum 24-hour interval is advised after Claritin before Benadryl, and a 6-hour interval after Benadryl before Claritin, but a healthcare provider should be consulted. Taking both Claritin and Benadryl together increases the risk of side effects. You also will not experience better allergy relief when taking both together in most cases. A moderate drug interaction exists between Benadryl and Claritin. View detailed information regarding this drug interaction. Yes, you can take Benadryl after Claritin, but it requires caution. Both are antihistamines with different effects, and taking them too close together can increase sedation and side effects. Taking Benadryl and Claritin together is generally safe but should be done cautiously due to differing effects and potential side effects. Both Benadryl (diphenhydramine) and Claritin (loratadine) are antihistamines and are generally not recommended to take together. However, Benadryl is fairly short-acting, with effects lasting about 4 to 8 hours after dosing. The short answer is no, it is not safe to take Benadryl and Claritin together without medical guidance. Both drugs belong to the same class of medications called antihistamines. Switching brands within a day, one full dose total at a time, is generally fine; piling full doses of two H1 antihistamines into the same day adds risk without meaningful benefit for routine allergies. While combining Claritin and Benadryl may seem logical for severe allergies, this approach typically isn't recommended due to increased side effects and safety risks. Avoid taking Claritin and Benadryl on the same day because Claritin stays in your body a long time. Both medicines are antihistamines that block histamine to relieve sneezing, runny nose, itchy.