No drug-drug interactions were observed between ramucirumab and paclitaxel. The pharmacokinetics of paclitaxel were not affected when co-administered with ramucirumab and the pharmacokinetics of ramucirumab were not affected when co-administered with paclitaxel. The pharmacokinetics of irinotecan and its active metabolite, SN-38, were not affected when co-administered with ramucirumab. The pharmacokinetics of docetaxel or erlotinib were not affected when co-administered with ramucirumab.