In some cases, however, the drugs are not effective or may cause unacceptable side effects such as nausea, vomiting, and headaches.
Currently available cough-suppressant therapy is limited by a paucity of effective agents and/or their unacceptable side effects.
Because of unacceptable side effects in subsequent examinations, further studies of ATP in humans were suspended.
Conclusions: Treatment with tamoxifen added only marginal benefit while causing unacceptable side effects.
One in seven men doesn't respond to Viagra, however, while others have unacceptable side effects.
Nevertheless, there is consistent opinion that during patient controlled analgesia (PCA) patients balance acceptable pain relief against unacceptable side effects.
Allopurinol may induce unacceptable side effects, and in patients with dose-limiting renal failure it may not be sufficiently effective.
Yet, with all of this progress, many drugs—even drugs discovered using the most advanced molecular biology strategies—have unacceptable side effects.
New drugs are not expected to reach the market for a few years, and many may fail or have unacceptable side effects.
And in children aged 3 to 10, none of the formulations tested initially provided sufficient protection without causing unacceptable side effects, including high fevers, headaches and nausea.
Despite the efforts, most of the new drug candidates failed because of their poor pharmacokinetic properties and/or unacceptable side effects.
