The phrase "agent exists for the" is not complete and lacks context, but it is grammatically correct and can be used in written English.
You can use it when discussing the role or purpose of an agent in a specific context, such as in business, technology, or philosophy.
Example: "In this system, the agent exists for the purpose of facilitating communication between users and the database."
Alternatives: "agent serves to" or "agent is intended for".
On the other hand, a potential for overdose exists owing to the long half-lives of LMWH and fondaparinux, and although protamine sulphate is able to partially neutralise LMWH, no reversal agent exists for fondaparinux [4].
Numerous pharmacological agents exist for the treatment of hypertension, including thiazide diuretics, angiotensin converting enzyme inhibitors (ACEIs), angiotensin II receptor blockers (ARBs), calcium channel blockers (CCBs), and beta-blockers (BBs) [ 7- 9], and these agents vary considerably in cost [ 7].
Few (if any) suitable agents exist for the selective inhibition of Rho GTPases to reduce platelet secretion, however, selective modulation of Rho GTPase activity through inhibition of upstream GEFs may hold more promise [ 95, 132, 143].
Several agents exist for this purpose, mainly lepirudin and argatroban.
Hormonally nonresponsive breast cancer (including estrogen receptor-negative cancer) is associated with poor prognosis for patients, and few chemoprevention agents exist for this type of cancer.
Some variations in rates of susceptibility to individual agents existed for isolates from different specimen types and patient locations (Table 2).
Furthermore, these women are also an ideal group in which to offer preventive therapy as they have already entered the medical system and have a right to know that they are at an increased risk of developing breast cancer and effective agents exist for reducing that risk.
Because no vaccines or effective antiviral agents exist for POWV, physicians in disease-endemic areas should advise their patients to take precautions to prevent tick bites, including wearing light-colored clothes with pants tucked into socks, using tick repellent, and carefully inspecting themselves and their pets for ticks after spending time outdoors (13 ).
Thus, evidence exists for the use of phytochemicals as novel chemotherapeutic agents.
