Working on experimental medications for a prenatal population places the infants at risk in addition to the female patients. In my professional experience instructing clients about raw pumpkin seeds and the DASH diet frequently helped prevent preeclampsia or high blood pressure problems from reoccurring for patients with a history of having had the problem during a previous pregnancy. Pumpkin seed kernels are similar to sunflower seeds, both are good sources of magnesium and many other nutrients. The DASH diet promotes eating a serving of nuts, seeds or beans daily as a source of magnesium. DASH stands for Dietary Approaches to Stop Hypertension. 
Additional note: *Raw pumpkin seeds were my recommendation because the toasted salted ones can be very salty which would dilute the amount of magnesium naturally available in the seed compared to the large amount of sodium available from the added salt. Excess sodium can cause increased urinary losses of magnesium in the average person and may increase risk of high blood pressure in people who are salt sensitive. 
In a recent study conducted in 19 hypertensive patients after 2 months of adherence to a low (50 mmol/d) and high (200 mmol/d) sodium intake, the investigators observed an increase in intracellular (erythrocyte) calcium and sodium concentrations and a reduction in magnesium concentration during salt loading, primarily in salt-sensitive subjects.82 
Nutritional strategies recommended to help prevent Alzheimer’s disease include increasing intake of magnesium. Research has found that low levels of magnesium promoted build up of beta amyloid protein while high levels of magnesium promoted breakdown of the misshapen proteins.
“Lab studies show that magnesium modulates enzymes involved in amyloid beta production; at low levels, magnesium favors amyloid beta buildup, while at higher levels it favors amyloid beta breakdown.101,102″ 
That article also contains good news for coffee drinkers; drinking 3 to 5 cups of caffeinated coffee per day is associated with reduced risk for Alzheimer’s disease. The article suggests that the caffeine content itself seems to provide the protective effects.  Coffee is also a good source of magnesium, perhaps that is a coincidence. However three to five cups of coffee is more than is recommended during pregnancy; one cup per day is likely safe while six cups of coffee per day may be harmful for pregnancy. The article also recommends blueberries and curcumin (found in turmeric which is commonly used in mustard and in curry powder) which would be safe during pregnancy.
The misshapen proteins have a protective effect against bacteria and the yeast Candida albicans so a chronic lowgrade infection may be an underlying cause of the accumulation of beta amyloid placques.  
/Disclaimer: This information is for educational or entertainment purposes, see a health professional for individual medical guidance./